diff --git a/.github/workflows/deploy-mkdocs.yml b/.github/workflows/deploy-mkdocs.yml
index bb48d35..1c8f7cd 100644
--- a/.github/workflows/deploy-mkdocs.yml
+++ b/.github/workflows/deploy-mkdocs.yml
@@ -81,7 +81,7 @@ jobs:
 
       - name: C2) Upload Pages artifact
         # WHY: Package the built site for Pages deployment.
-        uses: actions/upload-pages-artifact@v4
+        uses: actions/upload-pages-artifact@v5
         with:
           path: site