diff --git a/.github/workflows/main.yml b/.github/workflows/main.yml
index 195c8f4..e6938e6 100644
--- a/.github/workflows/main.yml
+++ b/.github/workflows/main.yml
@@ -21,7 +21,7 @@ jobs:
           sudo apt update -q
           sudo apt install -q -y libgnutls28-dev libcurl4-gnutls-dev
       
-      - uses: actions/checkout@v1
+      - uses: actions/checkout@v2.4.0
 
       - name: Set up Python ${{ matrix.python-version }}
         uses: actions/setup-python@v2