diff --git a/dev.sh b/backend/dev.sh
old mode 100755
new mode 100644
similarity index 87%
rename from dev.sh
rename to backend/dev.sh
index 60af0963..ec75e023
--- a/dev.sh
+++ b/backend/dev.sh
@@ -5,6 +5,9 @@
 
 python3 -m pip install -i https://pypi.tuna.tsinghua.edu.cn/simple install -r requirements-dev.txt
 
+# install git-hooks for pre-commit before committing.
+pre-commit install
+
 cd src || exit
 
 CONFIG_DIR="config"