diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 0dd35fc..51f6d2b 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -20,7 +20,7 @@ jobs:
         python-version: [3.7, 3.8, 3.9]
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2
         with:
@@ -106,7 +106,7 @@ jobs:
     needs: tests
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
       - name: Set up Python 3.8
         uses: actions/setup-python@v2
         with:
@@ -144,7 +144,7 @@ jobs:
     # if: env.MASTER_PUSH == 'true'
     steps:
       - name: Checkout
-        uses: actions/checkout@v2
+        uses: actions/checkout@v3.1.0
       - name: Set up Python 3.8
         uses: actions/setup-python@v2
         with: