diff --git a/package-lock.json b/package-lock.json
index 1d262c93..abd93d05 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -25,7 +25,7 @@
         "ms": "^3.0.0-canary.1",
         "nexus-rpc": "^0.0.1",
         "proto3-json-serializer": "^1.1.1",
-        "protobufjs": "7.5.1"
+        "protobufjs": "^8.7.1"
       },
       "devDependencies": {
         "@tsconfig/node24": "^24.0.4",
@@ -1744,6 +1744,29 @@
         "node": ">=14.0.0"
       }
     },
+    "node_modules/@temporalio/common/node_modules/protobufjs": {
+      "version": "7.6.6",
+      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.6.6.tgz",
+      "integrity": "sha512-dYDWdjSl5RNb7SgPxGQcRU+GtvP7s2fpkrY0r432PcOIaZ0/rBcxEZnQN67iJhFuQiVw754JDoPruPCNdGsbjg==",
+      "hasInstallScript": true,
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "@protobufjs/aspromise": "^1.1.2",
+        "@protobufjs/base64": "^1.1.2",
+        "@protobufjs/codegen": "^2.0.5",
+        "@protobufjs/eventemitter": "^1.1.1",
+        "@protobufjs/fetch": "^1.1.1",
+        "@protobufjs/float": "^1.0.2",
+        "@protobufjs/path": "^1.1.2",
+        "@protobufjs/pool": "^1.1.0",
+        "@protobufjs/utf8": "^1.1.1",
+        "@types/node": ">=13.7.0",
+        "long": "^5.3.2"
+      },
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
     "node_modules/@temporalio/core-bridge": {
       "version": "1.21.1",
       "resolved": "https://registry.npmjs.org/@temporalio/core-bridge/-/core-bridge-1.21.1.tgz",
@@ -6082,25 +6105,36 @@
         "node": ">=12.0.0"
       }
     },
-    "node_modules/protobufjs": {
-      "version": "7.5.1",
-      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.5.1.tgz",
-      "integrity": "sha512-3qx3IRjR9WPQKagdwrKjO3Gu8RgQR2qqw+1KnigWhoVjFqegIj1K3bP11sGqhxrO46/XL7lekuG4jmjL+4cLsw==",
+    "node_modules/proto3-json-serializer/node_modules/protobufjs": {
+      "version": "7.6.6",
+      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-7.6.6.tgz",
+      "integrity": "sha512-dYDWdjSl5RNb7SgPxGQcRU+GtvP7s2fpkrY0r432PcOIaZ0/rBcxEZnQN67iJhFuQiVw754JDoPruPCNdGsbjg==",
       "hasInstallScript": true,
       "license": "BSD-3-Clause",
       "dependencies": {
         "@protobufjs/aspromise": "^1.1.2",
         "@protobufjs/base64": "^1.1.2",
-        "@protobufjs/codegen": "^2.0.4",
-        "@protobufjs/eventemitter": "^1.1.0",
-        "@protobufjs/fetch": "^1.1.0",
+        "@protobufjs/codegen": "^2.0.5",
+        "@protobufjs/eventemitter": "^1.1.1",
+        "@protobufjs/fetch": "^1.1.1",
         "@protobufjs/float": "^1.0.2",
-        "@protobufjs/inquire": "^1.1.0",
         "@protobufjs/path": "^1.1.2",
         "@protobufjs/pool": "^1.1.0",
-        "@protobufjs/utf8": "^1.1.0",
+        "@protobufjs/utf8": "^1.1.1",
         "@types/node": ">=13.7.0",
-        "long": "^5.0.0"
+        "long": "^5.3.2"
+      },
+      "engines": {
+        "node": ">=12.0.0"
+      }
+    },
+    "node_modules/protobufjs": {
+      "version": "8.8.0",
+      "resolved": "https://registry.npmjs.org/protobufjs/-/protobufjs-8.8.0.tgz",
+      "integrity": "sha512-N3xhQ5yyBx3vQq4gubBfASzYhJGNzeDbjqBpu61g7UVylsN/qyffU96TKWD3GbbLOKF82VGNRNvv1+BFgE31Eg==",
+      "license": "BSD-3-Clause",
+      "dependencies": {
+        "long": "^5.3.2"
       },
       "engines": {
         "node": ">=12.0.0"
diff --git a/package.json b/package.json
index adeec156..1528f6f0 100644
--- a/package.json
+++ b/package.json
@@ -27,7 +27,7 @@
     "ms": "^3.0.0-canary.1",
     "nexus-rpc": "^0.0.1",
     "proto3-json-serializer": "^1.1.1",
-    "protobufjs": "7.5.1"
+    "protobufjs": "^8.7.1"
   },
   "devDependencies": {
     "@tsconfig/node24": "^24.0.4",
diff --git a/sdkbuild/typescript.go b/sdkbuild/typescript.go
index 2c0c7b8d..a76cb0a3 100644
--- a/sdkbuild/typescript.go
+++ b/sdkbuild/typescript.go
@@ -151,7 +151,7 @@ func BuildTypeScriptProgram(ctx context.Context, options BuildTypeScriptProgramO
   },
   "pnpm": {
 		"overrides": {
-			"protobufjs": "7.5.1"
+			"protobufjs": "^8.7.1"
 		}
   }
 }`