diff --git a/.github/workflows/mkdocs.yml b/.github/workflows/mkdocs.yml
index ec64c37..73bc596 100644
--- a/.github/workflows/mkdocs.yml
+++ b/.github/workflows/mkdocs.yml
@@ -13,7 +13,7 @@ jobs:
       - uses: actions/setup-python@v5
         with:
           python-version: 3.x
-      - uses: actions/cache@v2
+      - uses: actions/cache@v4
         with:
           key: ${{ github.ref }}
           path: .cache