diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index 0981969..cb67701 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -16,7 +16,7 @@ jobs:
           - '8.3'
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
       - name: Lint PHP
         run: Build/Scripts/runTests.sh -p ${{ matrix.php }} -s lint
@@ -29,7 +29,7 @@ jobs:
 
     steps:
       - name: Checkout
-        uses: actions/checkout@v4
+        uses: actions/checkout@de0fac2e4500dabe0009e67214ff5f5447ce83dd
 
       - name: Install testing system
         run: Build/Scripts/runTests.sh -p ${{ env.php }} -s composerUpdate