diff --git a/.github/workflows/publishdocs.yaml b/.github/workflows/publishdocs.yaml
index decd694..ba3f2f0 100644
--- a/.github/workflows/publishdocs.yaml
+++ b/.github/workflows/publishdocs.yaml
@@ -11,7 +11,7 @@ jobs:
     runs-on: ubuntu-latest
     steps:
     - name: Checkout master
-      uses: actions/checkout@v1
+      uses: actions/checkout@v4
 
     - name: Deploy docs
       uses: mhausenblas/mkdocs-deploy-gh-pages@master