diff --git a/README.md b/README.md
index ffcd5b6..8244647 100644
--- a/README.md
+++ b/README.md
@@ -2,7 +2,7 @@
 
 ## Quick Start
 
-To register the sandbox executor, you need to run go-judge before running this program.
+To register the sandbox executor, you need to run [`go-judge`](https://github.com/criyle/go-judge) before running this program. Install `go-judge` and start it with `go-judge -enable-grpc`
 
 ```bash
 $ make test