diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index e48c474..384d8d8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -17,7 +17,7 @@ jobs:
     name: on ${{ matrix.platform }}
 
     steps:
-    - uses: actions/checkout@v1
+    - uses: actions/checkout@v2.3.2
     - name: Set up JDK 8
       uses: actions/setup-java@v1
       with:
diff --git a/.github/workflows/sync-labels.yml b/.github/workflows/sync-labels.yml
index 1e4dc6c..5cba10a 100644
--- a/.github/workflows/sync-labels.yml
+++ b/.github/workflows/sync-labels.yml
@@ -10,7 +10,7 @@ jobs:
   build:
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@v2.3.2
       - uses: micnncim/action-label-syncer@v1
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}