diff --git a/.github/workflows/test.yaml b/.github/workflows/test.yaml
index 49745012b..a38fc09d0 100644
--- a/.github/workflows/test.yaml
+++ b/.github/workflows/test.yaml
@@ -11,7 +11,7 @@ jobs:
         python-version: [3.5, 3.6, 3.7, 3.8, 3.9]
 
     steps:
-    - uses: actions/checkout@v2
+    - uses: actions/checkout@v2.3.4
 
     - name: Set up Python ${{ matrix.python-version }}
       uses: actions/setup-python@v2.2.1