diff --git a/.github/workflows/lock-update.yaml b/.github/workflows/lock-update.yaml
index 5d9afcf..f95bcac 100644
--- a/.github/workflows/lock-update.yaml
+++ b/.github/workflows/lock-update.yaml
@@ -23,7 +23,7 @@ jobs:
         with:
           github_access_token: ${{ secrets.GITHUB_TOKEN }}
       - name: Cache nixpkgs mirror
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: .cache/nixpkgs.git
           key: nixpkgs-mirror-v1