diff --git a/ch02/productinfo/go/client/go.mod b/ch02/productinfo/go/client/go.mod
index 59756fe..69882f3 100644
--- a/ch02/productinfo/go/client/go.mod
+++ b/ch02/productinfo/go/client/go.mod
@@ -3,6 +3,6 @@ module productinfo/client
 go 1.16
 
 require (
-	github.com/golang/protobuf v1.3.2
-	google.golang.org/grpc v1.24.0
+	github.com/golang/protobuf v1.5.2
+	google.golang.org/grpc v1.53.0
 )