diff --git a/.github/workflows/publish-to-pypi.yml b/.github/workflows/publish-to-pypi.yml
index 6f27009d..2c7b3e69 100644
--- a/.github/workflows/publish-to-pypi.yml
+++ b/.github/workflows/publish-to-pypi.yml
@@ -9,7 +9,7 @@ jobs:
     name: Builds and publishes releases to PyPI
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@master
+      - uses: actions/checkout@v3.0.2
       - name: Set up Python 3.9
         uses: actions/setup-python@v4.2.0
         with:
diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 178b719c..cf36f623 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -19,7 +19,7 @@ jobs:
           - "3.10"
 
     steps:
-      - uses: actions/checkout@v2.3.4
+      - uses: actions/checkout@v3.0.2
         with:
           fetch-depth: 2
       - name: Set up Python ${{ matrix.python-version }}