diff --git a/.github/workflows/mirror.yml b/.github/workflows/mirror.yml
index b9ed166e1..9910935da 100644
--- a/.github/workflows/mirror.yml
+++ b/.github/workflows/mirror.yml
@@ -27,7 +27,7 @@ jobs:
           sudo apt-get install git-svn --no-install-recommends
 
       - name: checkout mirror config branch
-        uses: actions/checkout@v2
+        uses: actions/checkout@v2.3.4
 
       - name: Get current date as seconds
         id: get-date