diff --git a/.github/workflows/admob.yml b/.github/workflows/admob.yml
index c909473f0..82223b1b5 100644
--- a/.github/workflows/admob.yml
+++ b/.github/workflows/admob.yml
@@ -34,7 +34,7 @@ jobs:
       TEST: false
     steps:
       - name: Checkout
-        uses: actions/checkout@main
+        uses: actions/checkout@master
       - name: Setup
         run: |
           cd admob