diff --git a/.github/workflows/swift.yml b/.github/workflows/swift.yml
index f1d72c5..78bb116 100644
--- a/.github/workflows/swift.yml
+++ b/.github/workflows/swift.yml
@@ -10,6 +10,6 @@ jobs:
     test:
         runs-on: macos-latest
         steps:
-            - uses: actions/checkout@v2
+            - uses: actions/checkout@0717577d45739eb3c851188b29f50ed6c0b2194e # v2
             - name: Test HyperLabel
               run: ./scripts/test.sh