diff --git a/packages/grpc-web/package.json b/packages/grpc-web/package.json
index 10182ebe..217d400d 100644
--- a/packages/grpc-web/package.json
+++ b/packages/grpc-web/package.json
@@ -1,6 +1,6 @@
 {
   "name": "grpc-web",
-  "version": "0.3.0",
+  "version": "0.4.0",
   "author": "Google Inc.",
   "description": "gRPC-Web Client Runtime Library",
   "homepage": "https://grpc.io/",