diff --git a/.github/workflows/auto-release.yml b/.github/workflows/auto-release.yml
index 10ba8b4..d1590fb 100644
--- a/.github/workflows/auto-release.yml
+++ b/.github/workflows/auto-release.yml
@@ -25,7 +25,7 @@ jobs:
     needs:
       - publish
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Use Node.js 15.x
         uses: actions/setup-node@v1
         with:
diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index d3d6a84..93718b4 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -15,7 +15,7 @@ jobs:
       matrix:
         node-version: [10.x, 12.x, 14.x, 15.x]
     steps:
-      - uses: actions/checkout@v2
+      - uses: actions/checkout@3df4ab11eba7bda6032a0b82a6bb43b11571feac # v4
       - name: Use Node.js ${{ matrix.node-version }}
         uses: actions/setup-node@v1
         with: