diff --git a/.pnp.cjs b/.pnp.cjs
index ee903ce6..17c9755d 100755
--- a/.pnp.cjs
+++ b/.pnp.cjs
@@ -2219,7 +2219,7 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
       ],
       [
         "protobufjs",
-        "npm:6.10.2"
+        "npm:6.11.3"
       ],
       [
         "pump",
@@ -3150,7 +3150,7 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
           "packageDependencies": [
             ["@confio/ics23", "npm:0.6.8"],
             ["@noble/hashes", "npm:1.0.0"],
-            ["protobufjs", "npm:6.10.2"]
+            ["protobufjs", "npm:6.11.3"]
           ],
           "linkType": "HARD",
         }]
@@ -3293,7 +3293,7 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
             ["nyc", "npm:15.1.0"],
             ["pako", "npm:2.0.3"],
             ["prettier", "npm:2.4.1"],
-            ["protobufjs", "npm:6.10.2"],
+            ["protobufjs", "npm:6.11.3"],
             ["readonly-date", "npm:1.0.0"],
             ["ses", "npm:0.11.1"],
             ["source-map-support", "npm:0.5.19"],
@@ -3665,7 +3665,7 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
             ["long", "npm:4.0.0"],
             ["nyc", "npm:15.1.0"],
             ["prettier", "npm:2.4.1"],
-            ["protobufjs", "npm:6.10.2"],
+            ["protobufjs", "npm:6.11.3"],
             ["ses", "npm:0.11.1"],
             ["source-map-support", "npm:0.5.19"],
             ["ts-node", "virtual:4f1584ad4aba8733a24be7c8aebbffafef25607f2d00f4b314cf96717145c692763628a31c2b85d4686fbb091ff21ebffa3cc337399c042c19a32b9bdb786464#npm:8.10.2"],
@@ -3766,7 +3766,7 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
             ["long", "npm:4.0.0"],
             ["nyc", "npm:15.1.0"],
             ["prettier", "npm:2.4.1"],
-            ["protobufjs", "npm:6.10.2"],
+            ["protobufjs", "npm:6.11.3"],
             ["readonly-date", "npm:1.0.0"],
             ["ses", "npm:0.11.1"],
             ["source-map-support", "npm:0.5.19"],
@@ -4671,13 +4671,6 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
         }]
       ]],
       ["@types/node", [
-        ["npm:13.13.52", {
-          "packageLocation": "./.yarn/cache/@types-node-npm-13.13.52-95159539bb-8f1afff497.zip/node_modules/@types/node/",
-          "packageDependencies": [
-            ["@types/node", "npm:13.13.52"]
-          ],
-          "linkType": "HARD",
-        }],
         ["npm:15.3.1", {
           "packageLocation": "./.yarn/cache/@types-node-npm-15.3.1-2d4ca53b7d-b62091a722.zip/node_modules/@types/node/",
           "packageDependencies": [
@@ -10567,10 +10560,10 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
         }]
       ]],
       ["protobufjs", [
-        ["npm:6.10.2", {
-          "packageLocation": "./.yarn/unplugged/protobufjs-npm-6.10.2-f0f2cab7fe/node_modules/protobufjs/",
+        ["npm:6.11.2", {
+          "packageLocation": "./.yarn/unplugged/protobufjs-npm-6.11.2-9b422ce98e/node_modules/protobufjs/",
           "packageDependencies": [
-            ["protobufjs", "npm:6.10.2"],
+            ["protobufjs", "npm:6.11.2"],
             ["@protobufjs/aspromise", "npm:1.1.2"],
             ["@protobufjs/base64", "npm:1.1.2"],
             ["@protobufjs/codegen", "npm:2.0.4"],
@@ -10582,15 +10575,15 @@ function $$SETUP_STATE(hydrateRuntimeState, basePath) {
             ["@protobufjs/pool", "npm:1.1.0"],
             ["@protobufjs/utf8", "npm:1.1.0"],
             ["@types/long", "npm:4.0.1"],
-            ["@types/node", "npm:13.13.52"],
+            ["@types/node", "npm:15.9.0"],
             ["long", "npm:4.0.0"]
           ],
           "linkType": "HARD",
         }],
-        ["npm:6.11.2", {
-          "packageLocation": "./.yarn/unplugged/protobufjs-npm-6.11.2-9b422ce98e/node_modules/protobufjs/",
+        ["npm:6.11.3", {
+          "packageLocation": "./.yarn/unplugged/protobufjs-npm-6.11.3-566fb31188/node_modules/protobufjs/",
           "packageDependencies": [
-            ["protobufjs", "npm:6.11.2"],
+            ["protobufjs", "npm:6.11.3"],
             ["@protobufjs/aspromise", "npm:1.1.2"],
             ["@protobufjs/base64", "npm:1.1.2"],
             ["@protobufjs/codegen", "npm:2.0.4"],
diff --git a/.yarn/cache/@types-node-npm-13.13.52-95159539bb-8f1afff497.zip b/.yarn/cache/@types-node-npm-13.13.52-95159539bb-8f1afff497.zip
deleted file mode 100644
index 25819b27..00000000
--- a/.yarn/cache/@types-node-npm-13.13.52-95159539bb-8f1afff497.zip
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:c0bbb59063bd9d8b2d963923c97ba46c6d3de164a31bfda98de62f56b05dc1d1
-size 119225
diff --git a/.yarn/cache/protobufjs-npm-6.10.2-f0f2cab7fe-b48257c905.zip b/.yarn/cache/protobufjs-npm-6.10.2-f0f2cab7fe-b48257c905.zip
deleted file mode 100644
index b8d71527..00000000
--- a/.yarn/cache/protobufjs-npm-6.10.2-f0f2cab7fe-b48257c905.zip
+++ /dev/null
@@ -1,3 +0,0 @@
-version https://git-lfs.github.com/spec/v1
-oid sha256:ce6d206251b541427228b763898ec24cc804e01ac5de480f3cdf8b1105152e14
-size 754870
diff --git a/.yarn/cache/protobufjs-npm-6.11.3-566fb31188-4a6ce19641.zip b/.yarn/cache/protobufjs-npm-6.11.3-566fb31188-4a6ce19641.zip
new file mode 100644
index 00000000..b12b6458
--- /dev/null
+++ b/.yarn/cache/protobufjs-npm-6.11.3-566fb31188-4a6ce19641.zip
@@ -0,0 +1,3 @@
+version https://git-lfs.github.com/spec/v1
+oid sha256:117dcd9eea72ff364d1bcce79674a295f596f12339b1e768a52c27b7d7cfcca2
+size 758281
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 8654801a..8df0d803 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -17,6 +17,8 @@ and this project adheres to
 
 - @cosmjs/stargate: Let `calculateFee` handle fee amounts that exceed the safe
   integer range.
+- @cosmjs/cosmwasm-stargate, @cosmjs/stargate, @cosmjs/proto-signing: Upgrade
+  protobufjs to 6.11.
 
 ### Fixed
 
diff --git a/packages/cosmwasm-stargate/package.json b/packages/cosmwasm-stargate/package.json
index 116add73..009805db 100644
--- a/packages/cosmwasm-stargate/package.json
+++ b/packages/cosmwasm-stargate/package.json
@@ -49,7 +49,7 @@
     "cosmjs-types": "^0.4.0",
     "long": "^4.0.0",
     "pako": "^2.0.2",
-    "protobufjs": "~6.10.2"
+    "protobufjs": "~6.11.3"
   },
   "devDependencies": {
     "@istanbuljs/nyc-config-typescript": "^1.0.1",
diff --git a/packages/proto-signing/package.json b/packages/proto-signing/package.json
index a28d1d03..40478862 100644
--- a/packages/proto-signing/package.json
+++ b/packages/proto-signing/package.json
@@ -46,7 +46,7 @@
     "@cosmjs/utils": "workspace:packages/utils",
     "cosmjs-types": "^0.4.0",
     "long": "^4.0.0",
-    "protobufjs": "~6.10.2"
+    "protobufjs": "~6.11.3"
   },
   "devDependencies": {
     "@istanbuljs/nyc-config-typescript": "^1.0.1",
diff --git a/packages/stargate/package.json b/packages/stargate/package.json
index 21aa7a1e..c2f5b7aa 100644
--- a/packages/stargate/package.json
+++ b/packages/stargate/package.json
@@ -48,7 +48,7 @@
     "@cosmjs/utils": "workspace:packages/utils",
     "cosmjs-types": "^0.4.0",
     "long": "^4.0.0",
-    "protobufjs": "~6.10.2",
+    "protobufjs": "~6.11.3",
     "xstream": "^11.14.0"
   },
   "devDependencies": {
diff --git a/yarn.lock b/yarn.lock
index bfbb375f..8dc40f1e 100644
--- a/yarn.lock
+++ b/yarn.lock
@@ -428,7 +428,7 @@ __metadata:
     nyc: ^15.1.0
     pako: ^2.0.2
     prettier: ^2.4.1
-    protobufjs: ~6.10.2
+    protobufjs: ~6.11.3
     readonly-date: ^1.0.0
     ses: ^0.11.0
     source-map-support: ^0.5.19
@@ -786,7 +786,7 @@ __metadata:
     long: ^4.0.0
     nyc: ^15.1.0
     prettier: ^2.4.1
-    protobufjs: ~6.10.2
+    protobufjs: ~6.11.3
     ses: ^0.11.0
     source-map-support: ^0.5.19
     ts-node: ^8
@@ -883,7 +883,7 @@ __metadata:
     long: ^4.0.0
     nyc: ^15.1.0
     prettier: ^2.4.1
-    protobufjs: ~6.10.2
+    protobufjs: ~6.11.3
     readonly-date: ^1.0.0
     ses: ^0.11.0
     source-map-support: ^0.5.19
@@ -1682,13 +1682,6 @@ __metadata:
   languageName: node
   linkType: hard
 
-"@types/node@npm:^13.7.0":
-  version: 13.13.52
-  resolution: "@types/node@npm:13.13.52"
-  checksum: 8f1afff497ebeba209e2dc340d823284e087a47632afe99a7daa30eaff80893e520f222ad400cd1f2d3b8288e93cf3eaded52a8e64eaefb8aacfe6c35de98f42
-  languageName: node
-  linkType: hard
-
 "@types/pako@npm:^1.0.1":
   version: 1.0.1
   resolution: "@types/pako@npm:1.0.1"
@@ -6051,9 +6044,9 @@ __metadata:
   languageName: node
   linkType: hard
 
-"protobufjs@npm:^6.8.8, protobufjs@npm:~6.10.2":
-  version: 6.10.2
-  resolution: "protobufjs@npm:6.10.2"
+"protobufjs@npm:^6.8.8, protobufjs@npm:~6.11.3":
+  version: 6.11.3
+  resolution: "protobufjs@npm:6.11.3"
   dependencies:
     "@protobufjs/aspromise": ^1.1.2
     "@protobufjs/base64": ^1.1.2
@@ -6066,12 +6059,12 @@ __metadata:
     "@protobufjs/pool": ^1.1.0
     "@protobufjs/utf8": ^1.1.0
     "@types/long": ^4.0.1
-    "@types/node": ^13.7.0
+    "@types/node": ">=13.7.0"
     long: ^4.0.0
   bin:
     pbjs: bin/pbjs
     pbts: bin/pbts
-  checksum: b48257c90540533ace5940c95ea89eaf93ffdd5a13b00d8c13349b68e3a494e3b1dee8c3cb9271bacacf0179feac2acb20efe2979bf2fce7b5e1690f71e66332
+  checksum: 4a6ce1964167e4c45c53fd8a312d7646415c777dd31b4ba346719947b88e61654912326101f927da387d6b6473ab52a7ea4f54d6f15d63b31130ce28e2e15070
   languageName: node
   linkType: hard