diff --git a/packages/tendermint-rpc/src/client.spec.ts b/packages/tendermint-rpc/src/client.spec.ts
index acccac91..c6116f27 100644
--- a/packages/tendermint-rpc/src/client.spec.ts
+++ b/packages/tendermint-rpc/src/client.spec.ts
@@ -22,7 +22,7 @@ function pendingWithoutTendermint(): void {
 
 async function tendermintSearchIndexUpdated(): Promise<void> {
   // Tendermint needs some time before a committed transaction is found in search
-  return sleep(50);
+  return sleep(75);
 }
 
 function buildKvTx(k: string, v: string): TxBytes {
diff --git a/packages/tendermint-rpc/src/jsonrpc.spec.ts b/packages/tendermint-rpc/src/jsonrpc.spec.ts
index f061242f..557c70c0 100644
--- a/packages/tendermint-rpc/src/jsonrpc.spec.ts
+++ b/packages/tendermint-rpc/src/jsonrpc.spec.ts
@@ -5,7 +5,7 @@ describe("jsonrpc", () => {
     it("generates proper object with correct method", () => {
       const request = createJsonRpcRequest("do_something");
       expect(request.jsonrpc).toEqual("2.0");
-      expect(request.id).toMatch(/^[a-zA-Z0-9]{12}$/);
+      expect(request.id.toString()).toMatch(/^[0-9]{10,12}$/);
       expect(request.method).toEqual("do_something");
     });
 
diff --git a/packages/tendermint-rpc/src/jsonrpc.ts b/packages/tendermint-rpc/src/jsonrpc.ts
index 45b23182..0b944bd3 100644
--- a/packages/tendermint-rpc/src/jsonrpc.ts
+++ b/packages/tendermint-rpc/src/jsonrpc.ts
@@ -1,16 +1,19 @@
 import { JsonRpcRequest } from "@iov/jsonrpc";
 
-const alphabet = "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789";
+const numbers = "0123456789";
 
-/** generates a random alphanumeric character  */
-function randomChar(): string {
-  return alphabet[Math.floor(Math.random() * alphabet.length)];
+/** generates a random numeric character  */
+function randomNumericChar(): string {
+  return numbers[Math.floor(Math.random() * numbers.length)];
 }
 
-function randomId(): string {
-  return Array.from({ length: 12 })
-    .map(() => randomChar())
-    .join("");
+function randomId(): number {
+  return parseInt(
+    Array.from({ length: 12 })
+      .map(() => randomNumericChar())
+      .join(""),
+    10,
+  );
 }
 
 /** Creates a JSON-RPC request with random ID */
diff --git a/packages/tendermint-rpc/src/rpcclients/websocketclient.ts b/packages/tendermint-rpc/src/rpcclients/websocketclient.ts
index 51d246e0..e22595c3 100644
--- a/packages/tendermint-rpc/src/rpcclients/websocketclient.ts
+++ b/packages/tendermint-rpc/src/rpcclients/websocketclient.ts
@@ -95,7 +95,7 @@ class RpcEventProducer implements Producer<SubscriptionEvent> {
     // Tendermint adds an "#event" suffix for events that follow a previous subscription
     // https://github.com/tendermint/tendermint/blob/v0.23.0/rpc/core/events.go#L107
     const idEventSubscription = responseStream
-      .filter((response) => response.id === `${this.request.id}#event`)
+      .filter((response) => response.id === this.request.id)
       .subscribe({
         next: (response) => {
           if (isJsonRpcErrorResponse(response)) {
@@ -191,7 +191,7 @@ export class WebsocketClient implements RpcStreamingClient {
       this.subscriptionStreams.set(query, stream);
     }
     // eslint-disable-next-line @typescript-eslint/no-non-null-assertion
-    return this.subscriptionStreams.get(query)!;
+    return this.subscriptionStreams.get(query)!.filter((response) => response.query !== undefined);
   }
 
   /**
diff --git a/packages/tendermint-rpc/src/v0-33/responses.ts b/packages/tendermint-rpc/src/v0-33/responses.ts
index 35eef209..90b2bed4 100644
--- a/packages/tendermint-rpc/src/v0-33/responses.ts
+++ b/packages/tendermint-rpc/src/v0-33/responses.ts
@@ -528,9 +528,9 @@ function decodeStatus(data: RpcStatusResponse): responses.StatusResponse {
 /**
  * Example data:
  * {
- *   "RootHash": "10A1A17D5F818099B5CAB5B91733A3CC27C0DB6CE2D571AC27FB970C314308BB",
- *   "Data": "ZVlERVhDV2lVNEUwPXhTUjc4Tmp2QkNVSg==",
- *   "Proof": {
+ *   "root_hash": "10A1A17D5F818099B5CAB5B91733A3CC27C0DB6CE2D571AC27FB970C314308BB",
+ *   "data": "ZVlERVhDV2lVNEUwPXhTUjc4Tmp2QkNVSg==",
+ *   "proof": {
  *     "total": "1",
  *     "index": "0",
  *     "leaf_hash": "EKGhfV+BgJm1yrW5FzOjzCfA22zi1XGsJ/uXDDFDCLs=",
@@ -539,9 +539,9 @@ function decodeStatus(data: RpcStatusResponse): responses.StatusResponse {
  * }
  */
 interface RpcTxProof {
-  readonly Data: Base64String;
-  readonly RootHash: HexString;
-  readonly Proof: {
+  readonly data: Base64String;
+  readonly root_hash: HexString;
+  readonly proof: {
     readonly total: IntegerString;
     readonly index: IntegerString;
     readonly leaf_hash: Base64String;
@@ -551,13 +551,13 @@ interface RpcTxProof {
 
 function decodeTxProof(data: RpcTxProof): responses.TxProof {
   return {
-    data: Base64.decode(assertNotEmpty(data.Data)),
-    rootHash: fromHex(assertNotEmpty(data.RootHash)),
+    data: Base64.decode(assertNotEmpty(data.data)),
+    rootHash: fromHex(assertNotEmpty(data.root_hash)),
     proof: {
-      total: Integer.parse(assertNotEmpty(data.Proof.total)),
-      index: Integer.parse(assertNotEmpty(data.Proof.index)),
-      leafHash: Base64.decode(assertNotEmpty(data.Proof.leaf_hash)),
-      aunts: assertArray(data.Proof.aunts).map(Base64.decode),
+      total: Integer.parse(assertNotEmpty(data.proof.total)),
+      index: Integer.parse(assertNotEmpty(data.proof.index)),
+      leafHash: Base64.decode(assertNotEmpty(data.proof.leaf_hash)),
+      aunts: assertArray(data.proof.aunts).map(Base64.decode),
     },
   };
 }
diff --git a/scripts/tendermint/start.sh b/scripts/tendermint/start.sh
index e7bd33f8..16ac73c0 100755
--- a/scripts/tendermint/start.sh
+++ b/scripts/tendermint/start.sh
@@ -33,7 +33,7 @@ docker run --rm \
   --user="$UID" \
   --name "$TENDERMINT_NAME" \
   -p "${TENDERMINT_PORT}:26657" -v "${TMP_DIR}:/tendermint" \
-  -e "TM_TX_INDEX_INDEX_ALL_TAGS=true" \
+  -e "TM_TX_INDEX_INDEX_ALL_KEYS=true" \
   "tendermint/tendermint:${TENDERMINT_VERSION}" node \
   --proxy_app=kvstore \
   --rpc.laddr=tcp://0.0.0.0:26657 \