diff --git a/.github/workflows/checkin.yml b/.github/workflows/checkin.yml
index cf4f0d61..08e597b6 100644
--- a/.github/workflows/checkin.yml
+++ b/.github/workflows/checkin.yml
@@ -5,7 +5,7 @@ jobs:
   check_pr:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.4
 
     - name: "npm ci"
       run: npm ci
diff --git a/.github/workflows/publish.yml b/.github/workflows/publish.yml
index 46dbc9fc..6361da50 100644
--- a/.github/workflows/publish.yml
+++ b/.github/workflows/publish.yml
@@ -8,7 +8,7 @@ jobs:
   publish:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.4
     - uses: tgymnich/publish-github-action@v1
       with:
         github_token: ${{ secrets.GITHUB_TOKEN }}