diff --git a/tfserving-flutter/codelab2/starter/pubspec.yaml b/tfserving-flutter/codelab2/starter/pubspec.yaml
index 70f11123ed..473c9fdb89 100644
--- a/tfserving-flutter/codelab2/starter/pubspec.yaml
+++ b/tfserving-flutter/codelab2/starter/pubspec.yaml
@@ -35,7 +35,7 @@ dependencies:
   # Use with the CupertinoIcons class for iOS style icons.
   cupertino_icons: ^1.0.8
   http: ^1.6.0
-  protobuf: ^4.1.0
+  protobuf: ^5.1.0
   grpc: ^4.2.0
   fixnum: ^1.1.1