diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index b276734..dd5c44f 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -13,6 +13,6 @@
         uses: actions/checkout@v1
 
       - name: Deploy docs
-        uses: mhausenblas/mkdocs-deploy-gh-pages@master
+        uses: mhausenblas/mkdocs-deploy-gh-pages@v1.16
         env:
           GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}