diff --git a/.github/workflows/build-docs.yml b/.github/workflows/build-docs.yml
index a2cbf0513..738f6b7d4 100644
--- a/.github/workflows/build-docs.yml
+++ b/.github/workflows/build-docs.yml
@@ -46,7 +46,7 @@ jobs:
         run: python3.7 -m pip install git+https://${{ secrets.ACTIONS_TOKEN }}@github.com/squidfunk/mkdocs-material-insiders.git
       - uses: actions/cache@v2
         with:
-          key: mkdocs-cards-${{ github.ref }}
+          key: mkdocs-cards-${{ github.ref }}-v1
           path: .cache
       - name: Build Docs
         if: github.event.pull_request.head.repo.fork == true