diff --git a/packages/proto-loader/package.json b/packages/proto-loader/package.json
index e9b9e320a..08e5807da 100644
--- a/packages/proto-loader/package.json
+++ b/packages/proto-loader/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@grpc/proto-loader",
-  "version": "0.3.1",
+  "version": "0.4.0",
   "author": "Google Inc.",
   "contributors": [
     {