diff --git a/backend/install.sh b/backend/install.sh
index 9ea7304..d402659 100644
--- a/backend/install.sh
+++ b/backend/install.sh
@@ -1,3 +1,5 @@
+#!/bin/sh
 git clone --recursive https://github.com/bitleak/kvrocks.git
 cd kvrocks
+git checkout 2.0
 make -j4