diff --git a/packages/proto-signing/package.json b/packages/proto-signing/package.json
index 65a6b0b2..dd1ce24a 100644
--- a/packages/proto-signing/package.json
+++ b/packages/proto-signing/package.json
@@ -30,7 +30,7 @@
     "move-types": "shx rm -rf ./types/* && shx mv build/types/* ./types && rm -rf ./types/testdata && shx rm -f ./types/*.spec.d.ts",
     "format-types": "prettier --write --loglevel warn \"./types/**/*.d.ts\"",
     "prebuild": "shx rm -rf ./build",
-    "build": "tsc && shx mkdir -p build/generated && shx cp ./src/generated/*.js ./build/generated && shx mkdir -p ./build/types/generated && shx cp ./src/generated/*.d.ts ./build/types/generated",
+    "build": "tsc && shx mkdir -p build/codec/generated && shx cp ./src/codec/generated/*.js ./build/codec/generated/ && shx mkdir -p ./build/types/codec/generated && shx cp ./src/codec/generated/*.d.ts ./build/types/codec/generated",
     "postbuild": "yarn move-types && yarn format-types",
     "build-or-skip": "[ -n \"$SKIP_BUILD\" ] || yarn build",
     "test-node": "node jasmine-testrunner.js",
@@ -43,9 +43,10 @@
     "get-proto": "REF=20c80cfd44a068a592148d648c50de3459fd6295 ./scripts/get-proto.sh",
     "predefine-proto": "./scripts/predefine-proto.sh",
     "define-proto": "./scripts/define-proto.sh",
-    "postdefine-proto": "prettier --write \"src/generated/codecimpl.*\""
+    "postdefine-proto": "prettier --write \"src/codec/generated/codecimpl.*\""
   },
   "dependencies": {
+    "long": "^4.0.0",
     "protobufjs": "~6.10.0"
   },
   "devDependencies": {
diff --git a/packages/proto-signing/scripts/define-proto.sh b/packages/proto-signing/scripts/define-proto.sh
index e098edd8..16735b8b 100755
--- a/packages/proto-signing/scripts/define-proto.sh
+++ b/packages/proto-signing/scripts/define-proto.sh
@@ -5,7 +5,7 @@ command -v shellcheck > /dev/null && shellcheck "$0"
 TMP_DIR="./tmp"
 JS_SOURCE_FILE="$TMP_DIR/codecimpl.js"
 DEFINITIONS_FILE="$TMP_DIR/codecimpl.d.ts"
-OUTPUT_DIR="./src/generated/"
+OUTPUT_DIR="./src/codec/generated/"
 
 
 yarn pbts "$JS_SOURCE_FILE" -o "$DEFINITIONS_FILE"
diff --git a/packages/proto-signing/scripts/predefine-proto.sh b/packages/proto-signing/scripts/predefine-proto.sh
index 5f0a8d63..2676f4d7 100755
--- a/packages/proto-signing/scripts/predefine-proto.sh
+++ b/packages/proto-signing/scripts/predefine-proto.sh
@@ -19,6 +19,7 @@ yarn pbjs \
   --no-delimited \
   --no-verify \
   --no-convert \
+  --force-long \
   "$COSMOS_PROTO_DIR/cosmos.proto" \
   "$COSMOS_PROTO_DIR/bank/bank.proto" \
   "$COSMOS_PROTO_DIR/crypto/crypto.proto" \
diff --git a/packages/proto-signing/src/generated/codecimpl.d.ts b/packages/proto-signing/src/codec/generated/codecimpl.d.ts
similarity index 98%
rename from packages/proto-signing/src/generated/codecimpl.d.ts
rename to packages/proto-signing/src/codec/generated/codecimpl.d.ts
index 6b799286..e510d365 100644
--- a/packages/proto-signing/src/generated/codecimpl.d.ts
+++ b/packages/proto-signing/src/codec/generated/codecimpl.d.ts
@@ -231,10 +231,10 @@ export namespace cosmos {
   /** Properties of a GasInfo. */
   interface IGasInfo {
     /** GasInfo gasWanted */
-    gasWanted?: number | Long | null;
+    gasWanted?: Long | null;
 
     /** GasInfo gasUsed */
-    gasUsed?: number | Long | null;
+    gasUsed?: Long | null;
   }
 
   /** Represents a GasInfo. */
@@ -246,10 +246,10 @@ export namespace cosmos {
     constructor(p?: cosmos.IGasInfo);
 
     /** GasInfo gasWanted. */
-    public gasWanted: number | Long;
+    public gasWanted: Long;
 
     /** GasInfo gasUsed. */
-    public gasUsed: number | Long;
+    public gasUsed: Long;
 
     /**
      * Creates a new GasInfo instance using the specified properties.
@@ -476,7 +476,7 @@ export namespace cosmos {
   /** Properties of a TxResponse. */
   interface ITxResponse {
     /** TxResponse height */
-    height?: number | Long | null;
+    height?: Long | null;
 
     /** TxResponse txhash */
     txhash?: string | null;
@@ -500,10 +500,10 @@ export namespace cosmos {
     info?: string | null;
 
     /** TxResponse gasWanted */
-    gasWanted?: number | Long | null;
+    gasWanted?: Long | null;
 
     /** TxResponse gasUsed */
-    gasUsed?: number | Long | null;
+    gasUsed?: Long | null;
 
     /** TxResponse tx */
     tx?: google.protobuf.IAny | null;
@@ -521,7 +521,7 @@ export namespace cosmos {
     constructor(p?: cosmos.ITxResponse);
 
     /** TxResponse height. */
-    public height: number | Long;
+    public height: Long;
 
     /** TxResponse txhash. */
     public txhash: string;
@@ -545,10 +545,10 @@ export namespace cosmos {
     public info: string;
 
     /** TxResponse gasWanted. */
-    public gasWanted: number | Long;
+    public gasWanted: Long;
 
     /** TxResponse gasUsed. */
-    public gasUsed: number | Long;
+    public gasUsed: Long;
 
     /** TxResponse tx. */
     public tx?: google.protobuf.IAny | null;
@@ -1546,10 +1546,10 @@ export namespace cosmos {
       chainId?: string | null;
 
       /** SignDoc accountNumber */
-      accountNumber?: number | Long | null;
+      accountNumber?: Long | null;
 
       /** SignDoc accountSequence */
-      accountSequence?: number | Long | null;
+      accountSequence?: Long | null;
     }
 
     /** Represents a SignDoc. */
@@ -1570,10 +1570,10 @@ export namespace cosmos {
       public chainId: string;
 
       /** SignDoc accountNumber. */
-      public accountNumber: number | Long;
+      public accountNumber: Long;
 
       /** SignDoc accountSequence. */
-      public accountSequence: number | Long;
+      public accountSequence: Long;
 
       /**
        * Creates a new SignDoc instance using the specified properties.
@@ -1610,7 +1610,7 @@ export namespace cosmos {
       memo?: string | null;
 
       /** TxBody timeoutHeight */
-      timeoutHeight?: number | Long | null;
+      timeoutHeight?: Long | null;
 
       /** TxBody extensionOptions */
       extensionOptions?: google.protobuf.IAny[] | null;
@@ -1634,7 +1634,7 @@ export namespace cosmos {
       public memo: string;
 
       /** TxBody timeoutHeight. */
-      public timeoutHeight: number | Long;
+      public timeoutHeight: Long;
 
       /** TxBody extensionOptions. */
       public extensionOptions: google.protobuf.IAny[];
@@ -1918,7 +1918,7 @@ export namespace cosmos {
       amount?: cosmos.ICoin[] | null;
 
       /** Fee gasLimit */
-      gasLimit?: number | Long | null;
+      gasLimit?: Long | null;
     }
 
     /** Represents a Fee. */
@@ -1933,7 +1933,7 @@ export namespace cosmos {
       public amount: cosmos.ICoin[];
 
       /** Fee gasLimit. */
-      public gasLimit: number | Long;
+      public gasLimit: Long;
 
       /**
        * Creates a new Fee instance using the specified properties.
@@ -2476,10 +2476,10 @@ export namespace tendermint {
         version?: string | null;
 
         /** RequestInfo blockVersion */
-        blockVersion?: number | Long | null;
+        blockVersion?: Long | null;
 
         /** RequestInfo p2pVersion */
-        p2pVersion?: number | Long | null;
+        p2pVersion?: Long | null;
       }
 
       /** Represents a RequestInfo. */
@@ -2494,10 +2494,10 @@ export namespace tendermint {
         public version: string;
 
         /** RequestInfo blockVersion. */
-        public blockVersion: number | Long;
+        public blockVersion: Long;
 
         /** RequestInfo p2pVersion. */
-        public p2pVersion: number | Long;
+        public p2pVersion: Long;
 
         /**
          * Creates a new RequestInfo instance using the specified properties.
@@ -2668,7 +2668,7 @@ export namespace tendermint {
         path?: string | null;
 
         /** RequestQuery height */
-        height?: number | Long | null;
+        height?: Long | null;
 
         /** RequestQuery prove */
         prove?: boolean | null;
@@ -2689,7 +2689,7 @@ export namespace tendermint {
         public path: string;
 
         /** RequestQuery height. */
-        public height: number | Long;
+        public height: Long;
 
         /** RequestQuery prove. */
         public prove: boolean;
@@ -2911,7 +2911,7 @@ export namespace tendermint {
       /** Properties of a RequestEndBlock. */
       interface IRequestEndBlock {
         /** RequestEndBlock height */
-        height?: number | Long | null;
+        height?: Long | null;
       }
 
       /** Represents a RequestEndBlock. */
@@ -2923,7 +2923,7 @@ export namespace tendermint {
         constructor(p?: tendermint.abci.types.IRequestEndBlock);
 
         /** RequestEndBlock height. */
-        public height: number | Long;
+        public height: Long;
 
         /**
          * Creates a new RequestEndBlock instance using the specified properties.
@@ -3275,10 +3275,10 @@ export namespace tendermint {
         version?: string | null;
 
         /** ResponseInfo appVersion */
-        appVersion?: number | Long | null;
+        appVersion?: Long | null;
 
         /** ResponseInfo lastBlockHeight */
-        lastBlockHeight?: number | Long | null;
+        lastBlockHeight?: Long | null;
 
         /** ResponseInfo lastBlockAppHash */
         lastBlockAppHash?: Uint8Array | null;
@@ -3299,10 +3299,10 @@ export namespace tendermint {
         public version: string;
 
         /** ResponseInfo appVersion. */
-        public appVersion: number | Long;
+        public appVersion: Long;
 
         /** ResponseInfo lastBlockHeight. */
-        public lastBlockHeight: number | Long;
+        public lastBlockHeight: Long;
 
         /** ResponseInfo lastBlockAppHash. */
         public lastBlockAppHash: Uint8Array;
@@ -3470,7 +3470,7 @@ export namespace tendermint {
         info?: string | null;
 
         /** ResponseQuery index */
-        index?: number | Long | null;
+        index?: Long | null;
 
         /** ResponseQuery key */
         key?: Uint8Array | null;
@@ -3482,7 +3482,7 @@ export namespace tendermint {
         proof?: tendermint.crypto.merkle.IProof | null;
 
         /** ResponseQuery height */
-        height?: number | Long | null;
+        height?: Long | null;
 
         /** ResponseQuery codespace */
         codespace?: string | null;
@@ -3506,7 +3506,7 @@ export namespace tendermint {
         public info: string;
 
         /** ResponseQuery index. */
-        public index: number | Long;
+        public index: Long;
 
         /** ResponseQuery key. */
         public key: Uint8Array;
@@ -3518,7 +3518,7 @@ export namespace tendermint {
         public proof?: tendermint.crypto.merkle.IProof | null;
 
         /** ResponseQuery height. */
-        public height: number | Long;
+        public height: Long;
 
         /** ResponseQuery codespace. */
         public codespace: string;
@@ -3620,10 +3620,10 @@ export namespace tendermint {
         info?: string | null;
 
         /** ResponseCheckTx gasWanted */
-        gasWanted?: number | Long | null;
+        gasWanted?: Long | null;
 
         /** ResponseCheckTx gasUsed */
-        gasUsed?: number | Long | null;
+        gasUsed?: Long | null;
 
         /** ResponseCheckTx events */
         events?: tendermint.abci.types.IEvent[] | null;
@@ -3653,10 +3653,10 @@ export namespace tendermint {
         public info: string;
 
         /** ResponseCheckTx gasWanted. */
-        public gasWanted: number | Long;
+        public gasWanted: Long;
 
         /** ResponseCheckTx gasUsed. */
-        public gasUsed: number | Long;
+        public gasUsed: Long;
 
         /** ResponseCheckTx events. */
         public events: tendermint.abci.types.IEvent[];
@@ -3713,10 +3713,10 @@ export namespace tendermint {
         info?: string | null;
 
         /** ResponseDeliverTx gasWanted */
-        gasWanted?: number | Long | null;
+        gasWanted?: Long | null;
 
         /** ResponseDeliverTx gasUsed */
-        gasUsed?: number | Long | null;
+        gasUsed?: Long | null;
 
         /** ResponseDeliverTx events */
         events?: tendermint.abci.types.IEvent[] | null;
@@ -3746,10 +3746,10 @@ export namespace tendermint {
         public info: string;
 
         /** ResponseDeliverTx gasWanted. */
-        public gasWanted: number | Long;
+        public gasWanted: Long;
 
         /** ResponseDeliverTx gasUsed. */
-        public gasUsed: number | Long;
+        public gasUsed: Long;
 
         /** ResponseDeliverTx events. */
         public events: tendermint.abci.types.IEvent[];
@@ -3971,10 +3971,10 @@ export namespace tendermint {
       /** Properties of a BlockParams. */
       interface IBlockParams {
         /** BlockParams maxBytes */
-        maxBytes?: number | Long | null;
+        maxBytes?: Long | null;
 
         /** BlockParams maxGas */
-        maxGas?: number | Long | null;
+        maxGas?: Long | null;
       }
 
       /** Represents a BlockParams. */
@@ -3986,10 +3986,10 @@ export namespace tendermint {
         constructor(p?: tendermint.abci.types.IBlockParams);
 
         /** BlockParams maxBytes. */
-        public maxBytes: number | Long;
+        public maxBytes: Long;
 
         /** BlockParams maxGas. */
-        public maxGas: number | Long;
+        public maxGas: Long;
 
         /**
          * Creates a new BlockParams instance using the specified properties.
@@ -4022,7 +4022,7 @@ export namespace tendermint {
       /** Properties of an EvidenceParams. */
       interface IEvidenceParams {
         /** EvidenceParams maxAgeNumBlocks */
-        maxAgeNumBlocks?: number | Long | null;
+        maxAgeNumBlocks?: Long | null;
 
         /** EvidenceParams maxAgeDuration */
         maxAgeDuration?: google.protobuf.IDuration | null;
@@ -4037,7 +4037,7 @@ export namespace tendermint {
         constructor(p?: tendermint.abci.types.IEvidenceParams);
 
         /** EvidenceParams maxAgeNumBlocks. */
-        public maxAgeNumBlocks: number | Long;
+        public maxAgeNumBlocks: Long;
 
         /** EvidenceParams maxAgeDuration. */
         public maxAgeDuration?: google.protobuf.IDuration | null;
@@ -4242,7 +4242,7 @@ export namespace tendermint {
         chainId?: string | null;
 
         /** Header height */
-        height?: number | Long | null;
+        height?: Long | null;
 
         /** Header time */
         time?: google.protobuf.ITimestamp | null;
@@ -4293,7 +4293,7 @@ export namespace tendermint {
         public chainId: string;
 
         /** Header height. */
-        public height: number | Long;
+        public height: Long;
 
         /** Header time. */
         public time?: google.protobuf.ITimestamp | null;
@@ -4357,10 +4357,10 @@ export namespace tendermint {
       /** Properties of a Version. */
       interface IVersion {
         /** Version Block */
-        Block?: number | Long | null;
+        Block?: Long | null;
 
         /** Version App */
-        App?: number | Long | null;
+        App?: Long | null;
       }
 
       /** Represents a Version. */
@@ -4372,10 +4372,10 @@ export namespace tendermint {
         constructor(p?: tendermint.abci.types.IVersion);
 
         /** Version Block. */
-        public Block: number | Long;
+        public Block: Long;
 
         /** Version App. */
-        public App: number | Long;
+        public App: Long;
 
         /**
          * Creates a new Version instance using the specified properties.
@@ -4512,7 +4512,7 @@ export namespace tendermint {
         address?: Uint8Array | null;
 
         /** Validator power */
-        power?: number | Long | null;
+        power?: Long | null;
       }
 
       /** Represents a Validator. */
@@ -4527,7 +4527,7 @@ export namespace tendermint {
         public address: Uint8Array;
 
         /** Validator power. */
-        public power: number | Long;
+        public power: Long;
 
         /**
          * Creates a new Validator instance using the specified properties.
@@ -4561,7 +4561,7 @@ export namespace tendermint {
         pubKey?: tendermint.abci.types.IPubKey | null;
 
         /** ValidatorUpdate power */
-        power?: number | Long | null;
+        power?: Long | null;
       }
 
       /** Represents a ValidatorUpdate. */
@@ -4576,7 +4576,7 @@ export namespace tendermint {
         public pubKey?: tendermint.abci.types.IPubKey | null;
 
         /** ValidatorUpdate power. */
-        public power: number | Long;
+        public power: Long;
 
         /**
          * Creates a new ValidatorUpdate instance using the specified properties.
@@ -4719,13 +4719,13 @@ export namespace tendermint {
         validator?: tendermint.abci.types.IValidator | null;
 
         /** Evidence height */
-        height?: number | Long | null;
+        height?: Long | null;
 
         /** Evidence time */
         time?: google.protobuf.ITimestamp | null;
 
         /** Evidence totalVotingPower */
-        totalVotingPower?: number | Long | null;
+        totalVotingPower?: Long | null;
       }
 
       /** Represents an Evidence. */
@@ -4743,13 +4743,13 @@ export namespace tendermint {
         public validator?: tendermint.abci.types.IValidator | null;
 
         /** Evidence height. */
-        public height: number | Long;
+        public height: Long;
 
         /** Evidence time. */
         public time?: google.protobuf.ITimestamp | null;
 
         /** Evidence totalVotingPower. */
-        public totalVotingPower: number | Long;
+        public totalVotingPower: Long;
 
         /**
          * Creates a new Evidence instance using the specified properties.
@@ -5270,7 +5270,7 @@ export namespace tendermint {
         key?: Uint8Array | null;
 
         /** KI64Pair value */
-        value?: number | Long | null;
+        value?: Long | null;
       }
 
       /** Represents a KI64Pair. */
@@ -5285,7 +5285,7 @@ export namespace tendermint {
         public key: Uint8Array;
 
         /** KI64Pair value. */
-        public value: number | Long;
+        public value: Long;
 
         /**
          * Creates a new KI64Pair instance using the specified properties.
@@ -5372,7 +5372,7 @@ export namespace google {
     /** Properties of a Timestamp. */
     interface ITimestamp {
       /** Timestamp seconds */
-      seconds?: number | Long | null;
+      seconds?: Long | null;
 
       /** Timestamp nanos */
       nanos?: number | null;
@@ -5387,7 +5387,7 @@ export namespace google {
       constructor(p?: google.protobuf.ITimestamp);
 
       /** Timestamp seconds. */
-      public seconds: number | Long;
+      public seconds: Long;
 
       /** Timestamp nanos. */
       public nanos: number;
@@ -5421,7 +5421,7 @@ export namespace google {
     /** Properties of a Duration. */
     interface IDuration {
       /** Duration seconds */
-      seconds?: number | Long | null;
+      seconds?: Long | null;
 
       /** Duration nanos */
       nanos?: number | null;
@@ -5436,7 +5436,7 @@ export namespace google {
       constructor(p?: google.protobuf.IDuration);
 
       /** Duration seconds. */
-      public seconds: number | Long;
+      public seconds: Long;
 
       /** Duration nanos. */
       public nanos: number;
diff --git a/packages/proto-signing/src/generated/codecimpl.js b/packages/proto-signing/src/codec/generated/codecimpl.js
similarity index 100%
rename from packages/proto-signing/src/generated/codecimpl.js
rename to packages/proto-signing/src/codec/generated/codecimpl.js
diff --git a/packages/proto-signing/src/codec/index.ts b/packages/proto-signing/src/codec/index.ts
new file mode 100644
index 00000000..e27bfc7e
--- /dev/null
+++ b/packages/proto-signing/src/codec/index.ts
@@ -0,0 +1,9 @@
+import Long from "long";
+import protobuf from "protobufjs/minimal";
+
+// Ensure the protobuf module has a Long implementation, which otherwise only works
+// in Node.js (see https://github.com/protobufjs/protobuf.js/issues/921#issuecomment-334925145)
+protobuf.util.Long = Long;
+protobuf.configure();
+
+export * from "./generated/codecimpl";
diff --git a/packages/proto-signing/src/decorator.spec.ts b/packages/proto-signing/src/decorator.spec.ts
index 0f18f152..db872171 100644
--- a/packages/proto-signing/src/decorator.spec.ts
+++ b/packages/proto-signing/src/decorator.spec.ts
@@ -1,9 +1,10 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import { assert } from "@cosmjs/utils";
+import Long from "long";
 import { Message } from "protobufjs";
 
+import { cosmos, google } from "./codec";
 import { cosmosField, registered } from "./decorator";
-import { cosmos, google } from "./generated/codecimpl";
 import { Registry } from "./registry";
 
 const { TxBody } = cosmos.tx;
@@ -72,7 +73,7 @@ describe("decorator demo", () => {
     const txBody = TxBody.create({
       messages: [msgDemoWrapped],
       memo: "Some memo",
-      timeoutHeight: 9999,
+      timeoutHeight: Long.fromNumber(9999),
       extensionOptions: [],
     });
     const txBodyBytes = TxBody.encode(txBody).finish();
diff --git a/packages/proto-signing/src/demo.spec.ts b/packages/proto-signing/src/demo.spec.ts
index 818c20d0..1a0dc995 100644
--- a/packages/proto-signing/src/demo.spec.ts
+++ b/packages/proto-signing/src/demo.spec.ts
@@ -1,11 +1,12 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import { assert } from "@cosmjs/utils";
+import Long from "long";
 import protobuf from "protobufjs";
 
+import { cosmos, google } from "./codec";
 import reflectionRoot from "./demo";
 import demoJson from "./demo.json";
 import demoProto from "./demo.proto";
-import { cosmos, google } from "./generated/codecimpl";
 
 type MsgDemo = {
   readonly example: string;
@@ -40,7 +41,7 @@ describe("protobuf demo", () => {
     const txBody = TxBody.create({
       messages: [msgSendWrapped],
       memo: "Some memo",
-      timeoutHeight: 9999,
+      timeoutHeight: Long.fromNumber(9999),
       extensionOptions: [],
     });
     const txBodyBytes = TxBody.encode(txBody).finish();
@@ -72,7 +73,7 @@ describe("protobuf demo", () => {
     const txBody = TxBody.create({
       messages: [msgDemoWrapped],
       memo: "Some memo",
-      timeoutHeight: 9999,
+      timeoutHeight: Long.fromNumber(9999),
       extensionOptions: [],
     });
     const txBodyBytes = TxBody.encode(txBody).finish();
@@ -103,7 +104,7 @@ describe("protobuf demo", () => {
     const txBody = TxBody.create({
       messages: [msgDemoWrapped],
       memo: "Some memo",
-      timeoutHeight: 9999,
+      timeoutHeight: Long.fromNumber(9999),
       extensionOptions: [],
     });
     const txBodyBytes = TxBody.encode(txBody).finish();
@@ -133,7 +134,7 @@ describe("protobuf demo", () => {
     const txBody = TxBody.create({
       messages: [msgDemoWrapped],
       memo: "Some memo",
-      timeoutHeight: 9999,
+      timeoutHeight: Long.fromNumber(9999),
       extensionOptions: [],
     });
     const txBodyBytes = TxBody.encode(txBody).finish();
diff --git a/packages/proto-signing/src/magic.spec.ts b/packages/proto-signing/src/magic.spec.ts
index f9f93271..0e057811 100644
--- a/packages/proto-signing/src/magic.spec.ts
+++ b/packages/proto-signing/src/magic.spec.ts
@@ -1,4 +1,5 @@
 /* eslint-disable @typescript-eslint/naming-convention */
+import Long from "long";
 import { Message } from "protobufjs";
 
 import { cosmosField, registered } from "./decorator";
@@ -28,10 +29,10 @@ describe("registry magic demo", () => {
       public readonly bytesDemo?: Uint8Array;
 
       @cosmosField.int64(4)
-      public readonly int64Demo?: number;
+      public readonly int64Demo?: Long;
 
       @cosmosField.uint64(5)
-      public readonly uint64Demo?: number;
+      public readonly uint64Demo?: Long;
 
       @cosmosField.repeatedString(6)
       public readonly listDemo?: readonly string[];
@@ -68,8 +69,8 @@ describe("registry magic demo", () => {
       value: txBodyBytes,
     });
     expect(txBodyDecoded.memo).toEqual(txBodyFields.memo);
-    // int64Demo and uint64Demo decode to Long in Node
-    expect(Number(txBodyDecoded.timeoutHeight)).toEqual(txBodyFields.timeoutHeight);
+    // int64Demo and uint64Demo decode to Long
+    expect(txBodyDecoded.timeoutHeight).toEqual(Long.fromNumber(txBodyFields.timeoutHeight, true));
     expect(txBodyDecoded.extensionOptions).toEqual(txBodyFields.extensionOptions);
 
     const msgDemoDecoded = txBodyDecoded.messages[0] as MsgMagic;
@@ -77,9 +78,9 @@ describe("registry magic demo", () => {
     expect(msgDemoDecoded.booleanDemo).toEqual(msgDemoFields.booleanDemo);
     expect(msgDemoDecoded.stringDemo).toEqual(msgDemoFields.stringDemo);
     expect(msgDemoDecoded.bytesDemo).toEqual(msgDemoFields.bytesDemo);
-    // int64Demo and uint64Demo decode to Long in Node
-    expect(Number(msgDemoDecoded.int64Demo)).toEqual(msgDemoFields.int64Demo);
-    expect(Number(msgDemoDecoded.uint64Demo)).toEqual(msgDemoFields.uint64Demo);
+    // int64Demo and uint64Demo decode to Long
+    expect(msgDemoDecoded.int64Demo).toEqual(Long.fromNumber(msgDemoFields.int64Demo));
+    expect(msgDemoDecoded.uint64Demo).toEqual(Long.fromNumber(msgDemoFields.uint64Demo, true));
     expect(msgDemoDecoded.listDemo).toEqual(msgDemoFields.listDemo);
 
     expect(msgDemoDecoded.nestedDemo).toBeInstanceOf(MsgNestedMagic);
diff --git a/packages/proto-signing/src/msgs.spec.ts b/packages/proto-signing/src/msgs.spec.ts
index b4ce229c..fbeec18d 100644
--- a/packages/proto-signing/src/msgs.spec.ts
+++ b/packages/proto-signing/src/msgs.spec.ts
@@ -1,7 +1,7 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import { fromHex } from "@cosmjs/encoding";
 
-import { cosmos } from "./generated/codecimpl";
+import { cosmos } from "./codec";
 import { Coin, MsgSend } from "./msgs";
 
 describe("msgs", () => {
diff --git a/packages/proto-signing/src/registry.spec.ts b/packages/proto-signing/src/registry.spec.ts
index c0e7d462..c2971a5d 100644
--- a/packages/proto-signing/src/registry.spec.ts
+++ b/packages/proto-signing/src/registry.spec.ts
@@ -1,8 +1,9 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import { assert } from "@cosmjs/utils";
+import Long from "long";
 
+import { cosmos, google } from "./codec";
 import { MsgDemo as MsgDemoType } from "./demo";
-import { cosmos, google } from "./generated/codecimpl";
 import { Registry } from "./registry";
 
 const { TxBody } = cosmos.tx;
@@ -31,7 +32,7 @@ describe("registry demo", () => {
     const txBody = TxBody.create({
       messages: [msgSendWrapped],
       memo: "Some memo",
-      timeoutHeight: 9999,
+      timeoutHeight: Long.fromNumber(9999),
       extensionOptions: [],
     });
     const txBodyBytes = TxBody.encode(txBody).finish();
@@ -66,7 +67,7 @@ describe("registry demo", () => {
     const txBody = TxBody.create({
       messages: [msgDemoWrapped],
       memo: "Some memo",
-      timeoutHeight: 9999,
+      timeoutHeight: Long.fromNumber(9999),
       extensionOptions: [],
     });
     const txBodyBytes = TxBody.encode(txBody).finish();
diff --git a/packages/proto-signing/src/registry.ts b/packages/proto-signing/src/registry.ts
index 5a06b669..162266fa 100644
--- a/packages/proto-signing/src/registry.ts
+++ b/packages/proto-signing/src/registry.ts
@@ -1,7 +1,8 @@
 /* eslint-disable @typescript-eslint/naming-convention */
+import Long from "long";
 import protobuf from "protobufjs";
 
-import { cosmos, google } from "./generated/codecimpl";
+import { cosmos, google } from "./codec";
 
 export interface GeneratedType {
   readonly create: (properties?: { [k: string]: any }) => any;
@@ -22,7 +23,7 @@ export interface DecodeObject {
 export interface TxBodyValue {
   readonly messages: readonly EncodeObject[];
   readonly memo?: string;
-  readonly timeoutHeight?: number;
+  readonly timeoutHeight?: Long;
   readonly extensionOptions?: google.protobuf.IAny[];
   readonly nonCriticalExtensionOptions?: google.protobuf.IAny[];
 }
diff --git a/packages/proto-signing/src/signing.spec.ts b/packages/proto-signing/src/signing.spec.ts
index 989b9b65..261ea5ee 100644
--- a/packages/proto-signing/src/signing.spec.ts
+++ b/packages/proto-signing/src/signing.spec.ts
@@ -1,8 +1,9 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import { Bech32, fromBase64, fromHex, toHex } from "@cosmjs/encoding";
 import { Secp256k1Wallet } from "@cosmjs/launchpad";
+import Long from "long";
 
-import { cosmos } from "./generated/codecimpl";
+import { cosmos } from "./codec";
 import { defaultRegistry } from "./msgs";
 import { Registry, TxBodyValue } from "./registry";
 import { makeSignBytes } from "./signing";
@@ -66,7 +67,7 @@ describe("signing demo", () => {
 
   const sendAmount = "1234567";
   const sendDenom = "ucosm";
-  const gasLimit = 200000;
+  const gasLimit = Long.fromNumber(200000);
 
   it("correctly parses test vectors", async () => {
     const wallet = await Secp256k1Wallet.fromMnemonic(faucet.mnemonic);
diff --git a/packages/proto-signing/src/signing.ts b/packages/proto-signing/src/signing.ts
index c881aa3e..2b6be395 100644
--- a/packages/proto-signing/src/signing.ts
+++ b/packages/proto-signing/src/signing.ts
@@ -1,6 +1,6 @@
 /* eslint-disable @typescript-eslint/naming-convention */
 import { omitDefaults } from "./adr27";
-import { cosmos } from "./generated/codecimpl";
+import { cosmos } from "./codec";
 
 const { SignDoc } = cosmos.tx;
 
diff --git a/packages/proto-signing/types/generated/codecimpl.d.ts b/packages/proto-signing/types/codec/generated/codecimpl.d.ts
similarity index 98%
rename from packages/proto-signing/types/generated/codecimpl.d.ts
rename to packages/proto-signing/types/codec/generated/codecimpl.d.ts
index 6b799286..e510d365 100644
--- a/packages/proto-signing/types/generated/codecimpl.d.ts
+++ b/packages/proto-signing/types/codec/generated/codecimpl.d.ts
@@ -231,10 +231,10 @@ export namespace cosmos {
   /** Properties of a GasInfo. */
   interface IGasInfo {
     /** GasInfo gasWanted */
-    gasWanted?: number | Long | null;
+    gasWanted?: Long | null;
 
     /** GasInfo gasUsed */
-    gasUsed?: number | Long | null;
+    gasUsed?: Long | null;
   }
 
   /** Represents a GasInfo. */
@@ -246,10 +246,10 @@ export namespace cosmos {
     constructor(p?: cosmos.IGasInfo);
 
     /** GasInfo gasWanted. */
-    public gasWanted: number | Long;
+    public gasWanted: Long;
 
     /** GasInfo gasUsed. */
-    public gasUsed: number | Long;
+    public gasUsed: Long;
 
     /**
      * Creates a new GasInfo instance using the specified properties.
@@ -476,7 +476,7 @@ export namespace cosmos {
   /** Properties of a TxResponse. */
   interface ITxResponse {
     /** TxResponse height */
-    height?: number | Long | null;
+    height?: Long | null;
 
     /** TxResponse txhash */
     txhash?: string | null;
@@ -500,10 +500,10 @@ export namespace cosmos {
     info?: string | null;
 
     /** TxResponse gasWanted */
-    gasWanted?: number | Long | null;
+    gasWanted?: Long | null;
 
     /** TxResponse gasUsed */
-    gasUsed?: number | Long | null;
+    gasUsed?: Long | null;
 
     /** TxResponse tx */
     tx?: google.protobuf.IAny | null;
@@ -521,7 +521,7 @@ export namespace cosmos {
     constructor(p?: cosmos.ITxResponse);
 
     /** TxResponse height. */
-    public height: number | Long;
+    public height: Long;
 
     /** TxResponse txhash. */
     public txhash: string;
@@ -545,10 +545,10 @@ export namespace cosmos {
     public info: string;
 
     /** TxResponse gasWanted. */
-    public gasWanted: number | Long;
+    public gasWanted: Long;
 
     /** TxResponse gasUsed. */
-    public gasUsed: number | Long;
+    public gasUsed: Long;
 
     /** TxResponse tx. */
     public tx?: google.protobuf.IAny | null;
@@ -1546,10 +1546,10 @@ export namespace cosmos {
       chainId?: string | null;
 
       /** SignDoc accountNumber */
-      accountNumber?: number | Long | null;
+      accountNumber?: Long | null;
 
       /** SignDoc accountSequence */
-      accountSequence?: number | Long | null;
+      accountSequence?: Long | null;
     }
 
     /** Represents a SignDoc. */
@@ -1570,10 +1570,10 @@ export namespace cosmos {
       public chainId: string;
 
       /** SignDoc accountNumber. */
-      public accountNumber: number | Long;
+      public accountNumber: Long;
 
       /** SignDoc accountSequence. */
-      public accountSequence: number | Long;
+      public accountSequence: Long;
 
       /**
        * Creates a new SignDoc instance using the specified properties.
@@ -1610,7 +1610,7 @@ export namespace cosmos {
       memo?: string | null;
 
       /** TxBody timeoutHeight */
-      timeoutHeight?: number | Long | null;
+      timeoutHeight?: Long | null;
 
       /** TxBody extensionOptions */
       extensionOptions?: google.protobuf.IAny[] | null;
@@ -1634,7 +1634,7 @@ export namespace cosmos {
       public memo: string;
 
       /** TxBody timeoutHeight. */
-      public timeoutHeight: number | Long;
+      public timeoutHeight: Long;
 
       /** TxBody extensionOptions. */
       public extensionOptions: google.protobuf.IAny[];
@@ -1918,7 +1918,7 @@ export namespace cosmos {
       amount?: cosmos.ICoin[] | null;
 
       /** Fee gasLimit */
-      gasLimit?: number | Long | null;
+      gasLimit?: Long | null;
     }
 
     /** Represents a Fee. */
@@ -1933,7 +1933,7 @@ export namespace cosmos {
       public amount: cosmos.ICoin[];
 
       /** Fee gasLimit. */
-      public gasLimit: number | Long;
+      public gasLimit: Long;
 
       /**
        * Creates a new Fee instance using the specified properties.
@@ -2476,10 +2476,10 @@ export namespace tendermint {
         version?: string | null;
 
         /** RequestInfo blockVersion */
-        blockVersion?: number | Long | null;
+        blockVersion?: Long | null;
 
         /** RequestInfo p2pVersion */
-        p2pVersion?: number | Long | null;
+        p2pVersion?: Long | null;
       }
 
       /** Represents a RequestInfo. */
@@ -2494,10 +2494,10 @@ export namespace tendermint {
         public version: string;
 
         /** RequestInfo blockVersion. */
-        public blockVersion: number | Long;
+        public blockVersion: Long;
 
         /** RequestInfo p2pVersion. */
-        public p2pVersion: number | Long;
+        public p2pVersion: Long;
 
         /**
          * Creates a new RequestInfo instance using the specified properties.
@@ -2668,7 +2668,7 @@ export namespace tendermint {
         path?: string | null;
 
         /** RequestQuery height */
-        height?: number | Long | null;
+        height?: Long | null;
 
         /** RequestQuery prove */
         prove?: boolean | null;
@@ -2689,7 +2689,7 @@ export namespace tendermint {
         public path: string;
 
         /** RequestQuery height. */
-        public height: number | Long;
+        public height: Long;
 
         /** RequestQuery prove. */
         public prove: boolean;
@@ -2911,7 +2911,7 @@ export namespace tendermint {
       /** Properties of a RequestEndBlock. */
       interface IRequestEndBlock {
         /** RequestEndBlock height */
-        height?: number | Long | null;
+        height?: Long | null;
       }
 
       /** Represents a RequestEndBlock. */
@@ -2923,7 +2923,7 @@ export namespace tendermint {
         constructor(p?: tendermint.abci.types.IRequestEndBlock);
 
         /** RequestEndBlock height. */
-        public height: number | Long;
+        public height: Long;
 
         /**
          * Creates a new RequestEndBlock instance using the specified properties.
@@ -3275,10 +3275,10 @@ export namespace tendermint {
         version?: string | null;
 
         /** ResponseInfo appVersion */
-        appVersion?: number | Long | null;
+        appVersion?: Long | null;
 
         /** ResponseInfo lastBlockHeight */
-        lastBlockHeight?: number | Long | null;
+        lastBlockHeight?: Long | null;
 
         /** ResponseInfo lastBlockAppHash */
         lastBlockAppHash?: Uint8Array | null;
@@ -3299,10 +3299,10 @@ export namespace tendermint {
         public version: string;
 
         /** ResponseInfo appVersion. */
-        public appVersion: number | Long;
+        public appVersion: Long;
 
         /** ResponseInfo lastBlockHeight. */
-        public lastBlockHeight: number | Long;
+        public lastBlockHeight: Long;
 
         /** ResponseInfo lastBlockAppHash. */
         public lastBlockAppHash: Uint8Array;
@@ -3470,7 +3470,7 @@ export namespace tendermint {
         info?: string | null;
 
         /** ResponseQuery index */
-        index?: number | Long | null;
+        index?: Long | null;
 
         /** ResponseQuery key */
         key?: Uint8Array | null;
@@ -3482,7 +3482,7 @@ export namespace tendermint {
         proof?: tendermint.crypto.merkle.IProof | null;
 
         /** ResponseQuery height */
-        height?: number | Long | null;
+        height?: Long | null;
 
         /** ResponseQuery codespace */
         codespace?: string | null;
@@ -3506,7 +3506,7 @@ export namespace tendermint {
         public info: string;
 
         /** ResponseQuery index. */
-        public index: number | Long;
+        public index: Long;
 
         /** ResponseQuery key. */
         public key: Uint8Array;
@@ -3518,7 +3518,7 @@ export namespace tendermint {
         public proof?: tendermint.crypto.merkle.IProof | null;
 
         /** ResponseQuery height. */
-        public height: number | Long;
+        public height: Long;
 
         /** ResponseQuery codespace. */
         public codespace: string;
@@ -3620,10 +3620,10 @@ export namespace tendermint {
         info?: string | null;
 
         /** ResponseCheckTx gasWanted */
-        gasWanted?: number | Long | null;
+        gasWanted?: Long | null;
 
         /** ResponseCheckTx gasUsed */
-        gasUsed?: number | Long | null;
+        gasUsed?: Long | null;
 
         /** ResponseCheckTx events */
         events?: tendermint.abci.types.IEvent[] | null;
@@ -3653,10 +3653,10 @@ export namespace tendermint {
         public info: string;
 
         /** ResponseCheckTx gasWanted. */
-        public gasWanted: number | Long;
+        public gasWanted: Long;
 
         /** ResponseCheckTx gasUsed. */
-        public gasUsed: number | Long;
+        public gasUsed: Long;
 
         /** ResponseCheckTx events. */
         public events: tendermint.abci.types.IEvent[];
@@ -3713,10 +3713,10 @@ export namespace tendermint {
         info?: string | null;
 
         /** ResponseDeliverTx gasWanted */
-        gasWanted?: number | Long | null;
+        gasWanted?: Long | null;
 
         /** ResponseDeliverTx gasUsed */
-        gasUsed?: number | Long | null;
+        gasUsed?: Long | null;
 
         /** ResponseDeliverTx events */
         events?: tendermint.abci.types.IEvent[] | null;
@@ -3746,10 +3746,10 @@ export namespace tendermint {
         public info: string;
 
         /** ResponseDeliverTx gasWanted. */
-        public gasWanted: number | Long;
+        public gasWanted: Long;
 
         /** ResponseDeliverTx gasUsed. */
-        public gasUsed: number | Long;
+        public gasUsed: Long;
 
         /** ResponseDeliverTx events. */
         public events: tendermint.abci.types.IEvent[];
@@ -3971,10 +3971,10 @@ export namespace tendermint {
       /** Properties of a BlockParams. */
       interface IBlockParams {
         /** BlockParams maxBytes */
-        maxBytes?: number | Long | null;
+        maxBytes?: Long | null;
 
         /** BlockParams maxGas */
-        maxGas?: number | Long | null;
+        maxGas?: Long | null;
       }
 
       /** Represents a BlockParams. */
@@ -3986,10 +3986,10 @@ export namespace tendermint {
         constructor(p?: tendermint.abci.types.IBlockParams);
 
         /** BlockParams maxBytes. */
-        public maxBytes: number | Long;
+        public maxBytes: Long;
 
         /** BlockParams maxGas. */
-        public maxGas: number | Long;
+        public maxGas: Long;
 
         /**
          * Creates a new BlockParams instance using the specified properties.
@@ -4022,7 +4022,7 @@ export namespace tendermint {
       /** Properties of an EvidenceParams. */
       interface IEvidenceParams {
         /** EvidenceParams maxAgeNumBlocks */
-        maxAgeNumBlocks?: number | Long | null;
+        maxAgeNumBlocks?: Long | null;
 
         /** EvidenceParams maxAgeDuration */
         maxAgeDuration?: google.protobuf.IDuration | null;
@@ -4037,7 +4037,7 @@ export namespace tendermint {
         constructor(p?: tendermint.abci.types.IEvidenceParams);
 
         /** EvidenceParams maxAgeNumBlocks. */
-        public maxAgeNumBlocks: number | Long;
+        public maxAgeNumBlocks: Long;
 
         /** EvidenceParams maxAgeDuration. */
         public maxAgeDuration?: google.protobuf.IDuration | null;
@@ -4242,7 +4242,7 @@ export namespace tendermint {
         chainId?: string | null;
 
         /** Header height */
-        height?: number | Long | null;
+        height?: Long | null;
 
         /** Header time */
         time?: google.protobuf.ITimestamp | null;
@@ -4293,7 +4293,7 @@ export namespace tendermint {
         public chainId: string;
 
         /** Header height. */
-        public height: number | Long;
+        public height: Long;
 
         /** Header time. */
         public time?: google.protobuf.ITimestamp | null;
@@ -4357,10 +4357,10 @@ export namespace tendermint {
       /** Properties of a Version. */
       interface IVersion {
         /** Version Block */
-        Block?: number | Long | null;
+        Block?: Long | null;
 
         /** Version App */
-        App?: number | Long | null;
+        App?: Long | null;
       }
 
       /** Represents a Version. */
@@ -4372,10 +4372,10 @@ export namespace tendermint {
         constructor(p?: tendermint.abci.types.IVersion);
 
         /** Version Block. */
-        public Block: number | Long;
+        public Block: Long;
 
         /** Version App. */
-        public App: number | Long;
+        public App: Long;
 
         /**
          * Creates a new Version instance using the specified properties.
@@ -4512,7 +4512,7 @@ export namespace tendermint {
         address?: Uint8Array | null;
 
         /** Validator power */
-        power?: number | Long | null;
+        power?: Long | null;
       }
 
       /** Represents a Validator. */
@@ -4527,7 +4527,7 @@ export namespace tendermint {
         public address: Uint8Array;
 
         /** Validator power. */
-        public power: number | Long;
+        public power: Long;
 
         /**
          * Creates a new Validator instance using the specified properties.
@@ -4561,7 +4561,7 @@ export namespace tendermint {
         pubKey?: tendermint.abci.types.IPubKey | null;
 
         /** ValidatorUpdate power */
-        power?: number | Long | null;
+        power?: Long | null;
       }
 
       /** Represents a ValidatorUpdate. */
@@ -4576,7 +4576,7 @@ export namespace tendermint {
         public pubKey?: tendermint.abci.types.IPubKey | null;
 
         /** ValidatorUpdate power. */
-        public power: number | Long;
+        public power: Long;
 
         /**
          * Creates a new ValidatorUpdate instance using the specified properties.
@@ -4719,13 +4719,13 @@ export namespace tendermint {
         validator?: tendermint.abci.types.IValidator | null;
 
         /** Evidence height */
-        height?: number | Long | null;
+        height?: Long | null;
 
         /** Evidence time */
         time?: google.protobuf.ITimestamp | null;
 
         /** Evidence totalVotingPower */
-        totalVotingPower?: number | Long | null;
+        totalVotingPower?: Long | null;
       }
 
       /** Represents an Evidence. */
@@ -4743,13 +4743,13 @@ export namespace tendermint {
         public validator?: tendermint.abci.types.IValidator | null;
 
         /** Evidence height. */
-        public height: number | Long;
+        public height: Long;
 
         /** Evidence time. */
         public time?: google.protobuf.ITimestamp | null;
 
         /** Evidence totalVotingPower. */
-        public totalVotingPower: number | Long;
+        public totalVotingPower: Long;
 
         /**
          * Creates a new Evidence instance using the specified properties.
@@ -5270,7 +5270,7 @@ export namespace tendermint {
         key?: Uint8Array | null;
 
         /** KI64Pair value */
-        value?: number | Long | null;
+        value?: Long | null;
       }
 
       /** Represents a KI64Pair. */
@@ -5285,7 +5285,7 @@ export namespace tendermint {
         public key: Uint8Array;
 
         /** KI64Pair value. */
-        public value: number | Long;
+        public value: Long;
 
         /**
          * Creates a new KI64Pair instance using the specified properties.
@@ -5372,7 +5372,7 @@ export namespace google {
     /** Properties of a Timestamp. */
     interface ITimestamp {
       /** Timestamp seconds */
-      seconds?: number | Long | null;
+      seconds?: Long | null;
 
       /** Timestamp nanos */
       nanos?: number | null;
@@ -5387,7 +5387,7 @@ export namespace google {
       constructor(p?: google.protobuf.ITimestamp);
 
       /** Timestamp seconds. */
-      public seconds: number | Long;
+      public seconds: Long;
 
       /** Timestamp nanos. */
       public nanos: number;
@@ -5421,7 +5421,7 @@ export namespace google {
     /** Properties of a Duration. */
     interface IDuration {
       /** Duration seconds */
-      seconds?: number | Long | null;
+      seconds?: Long | null;
 
       /** Duration nanos */
       nanos?: number | null;
@@ -5436,7 +5436,7 @@ export namespace google {
       constructor(p?: google.protobuf.IDuration);
 
       /** Duration seconds. */
-      public seconds: number | Long;
+      public seconds: Long;
 
       /** Duration nanos. */
       public nanos: number;
diff --git a/packages/proto-signing/types/codec/index.d.ts b/packages/proto-signing/types/codec/index.d.ts
new file mode 100644
index 00000000..7cbb5810
--- /dev/null
+++ b/packages/proto-signing/types/codec/index.d.ts
@@ -0,0 +1 @@
+export * from "./generated/codecimpl";
diff --git a/packages/proto-signing/types/registry.d.ts b/packages/proto-signing/types/registry.d.ts
index db41d2e1..4016a1ad 100644
--- a/packages/proto-signing/types/registry.d.ts
+++ b/packages/proto-signing/types/registry.d.ts
@@ -1,5 +1,6 @@
+import Long from "long";
 import protobuf from "protobufjs";
-import { cosmos, google } from "./generated/codecimpl";
+import { cosmos, google } from "./codec";
 export interface GeneratedType {
   readonly create: (properties?: { [k: string]: any }) => any;
   readonly encode: (
@@ -23,7 +24,7 @@ export interface DecodeObject {
 export interface TxBodyValue {
   readonly messages: readonly EncodeObject[];
   readonly memo?: string;
-  readonly timeoutHeight?: number;
+  readonly timeoutHeight?: Long;
   readonly extensionOptions?: google.protobuf.IAny[];
   readonly nonCriticalExtensionOptions?: google.protobuf.IAny[];
 }
diff --git a/packages/stargate/package.json b/packages/stargate/package.json
index b5e417ad..c4fb5fd8 100644
--- a/packages/stargate/package.json
+++ b/packages/stargate/package.json
@@ -53,6 +53,7 @@
     "@cosmjs/stream": "^0.22.2",
     "@cosmjs/tendermint-rpc": "^0.22.2",
     "@cosmjs/utils": "^0.22.2",
+    "long": "^4.0.0",
     "protobufjs": "~6.10.0"
   }
 }