diff --git a/packages/grpc-web/package.json b/packages/grpc-web/package.json
index e796b8d6..db110101 100644
--- a/packages/grpc-web/package.json
+++ b/packages/grpc-web/package.json
@@ -30,7 +30,7 @@
     "google-closure-compiler": "~20200224.0.0",
     "google-closure-deps": "~20210601.0.0",
     "google-closure-library": "~20210808.0.0",
-    "google-protobuf": "~3.14.0",
+    "google-protobuf": "~3.21.1",
     "gulp": "~4.0.2",
     "gulp-connect": "~5.7.0",
     "gulp-eval": "~1.0.0",