diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index 578aae6..ac9b83a 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -151,7 +151,7 @@ jobs:
 
       - name: "Load cached site."
         id: cache
-        uses: actions/cache/restore@v4
+        uses: actions/cache/restore@v5
         with:
           key: github-pages-${{ steps.params.outputs.sha }}
           path: _site/
@@ -216,7 +216,7 @@ jobs:
 
       - name: "Store _site to cache."
         if: ${{ steps.cache.outputs.cache-hit != 'true' }}
-        uses: actions/cache/save@v4
+        uses: actions/cache/save@v5
         with:
           key: ${{ steps.cache.outputs.cache-primary-key }}
           path: _site/