diff --git a/.github/workflows/docs.yml b/.github/workflows/docs.yml
index 8b0d6e2e..1867a57b 100644
--- a/.github/workflows/docs.yml
+++ b/.github/workflows/docs.yml
@@ -28,7 +28,7 @@ jobs:
       - name: Setup dependencies
         run: pip install mkdocs-material pillow cairosvg mkdocs-minify-plugin
       - name: Build docs
-        run: mkdocs build
+        run: mkdocs build --strict
       - name: Upload artifact
         uses: actions/upload-pages-artifact@v1
         with: