diff --git a/.github/workflows/mkdocs.yml b/.github/workflows/mkdocs.yml
index ecc24517..e284c8b5 100644
--- a/.github/workflows/mkdocs.yml
+++ b/.github/workflows/mkdocs.yml
@@ -8,7 +8,7 @@ jobs:
   linux:
     runs-on: ubuntu-latest
     steps:
-    - uses: actions/checkout@v4
+    - uses: actions/checkout@v3
     - name: Set up Python 3.8
       uses: actions/setup-python@v1
       with: