diff --git a/pkg/runtime/init.go b/pkg/runtime/init.go
index dc42880b..7601ad0b 100644
--- a/pkg/runtime/init.go
+++ b/pkg/runtime/init.go
@@ -41,10 +41,11 @@ func initRuntime(maxProc int) {
 	}
 
 	fmt.Println("Init kcl runtime ...")
-	time.Sleep(time.Duration(2000) * time.Millisecond)
 	rpcRuntime = NewRuntime(int(maxProc), "kclvm_cli", "server")
 	rpcRuntime.Start()
 
+	time.Sleep(time.Duration(2000) * time.Millisecond)
+
 	client := &BuiltinServiceClient{
 		Runtime: rpcRuntime,
 	}