diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 30fe21f..ac0c3bc 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -6,6 +6,6 @@ jobs:
     name: Run test suite
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
       - name: Run tests
         run: ./scripts/test.sh
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 3d936e2..258e319 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -9,7 +9,7 @@ jobs:
     name: Publish setup script
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v3.1.0
       - name: Set up Cloud SDK
         uses: google-github-actions/setup-gcloud@master
         with: