diff --git a/grpc/README.md b/grpc/README.md
index e9aac97..c087f5a 100644
--- a/grpc/README.md
+++ b/grpc/README.md
@@ -35,7 +35,7 @@ gobin google.golang.org/protobuf/cmd/protoc-gen-go
 gobin google.golang.org/grpc/cmd/protoc-gen-go-grpc
 ```
 
-For generating HTTP JSON APIs with [grpc-gateway](https://grpc-ecosystem.github.io/grpc-gateway/), follow
+For generating HTTP JSON APIs with [grpc-gateway](https://grpc-ecosystem.github.io/grpc-gateway/) **v2.2.0**, follow
 the [documentation](https://github.com/grpc-ecosystem/grpc-gateway#installation).
 
 For generating validators