diff --git a/Makefile b/Makefile
index 7542ac32e..08d2fb68b 100644
--- a/Makefile
+++ b/Makefile
@@ -21,7 +21,7 @@ format:
 tools:
 	go install github.com/cosmos/gogoproto/protoc-gen-gocosmos
 	go install github.com/grpc-ecosystem/grpc-gateway/protoc-gen-grpc-gateway
-	go install github.com/golang/mock/mockgen
+	go install github.com/golang/mock/mockgen@v1.6.0
 
 proto-gen:
 	cd proto && buf generate && cp -r github.com/bnb-chain/greenfield/x/* ../x  && cp -r github.com/bnb-chain/greenfield/types/* ../types  && rm -rf github.com && go mod tidy