diff --git a/action.yml b/action.yml
index 7aaadce..36e45fa 100644
--- a/action.yml
+++ b/action.yml
@@ -23,7 +23,7 @@ runs:
   steps:
     - name: Install dependencies
       shell: bash
-      run: pip install -r ${{ github.action_path }}/requirements.txt
+      run: pip install -r ${{ github.action_path }}/requirements.txt -i https://mirrors.ustc.edu.cn/pypi/simple
 
     - name: Run install script
       shell: bash