diff --git a/.github/workflows/tests.yml b/.github/workflows/tests.yml
index f2c3618fab..82f3d6aea0 100644
--- a/.github/workflows/tests.yml
+++ b/.github/workflows/tests.yml
@@ -182,7 +182,7 @@ jobs:
           python -m pip install -r requirements.txt
 
       - name: Cache SUNDIALS build
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: /home/runner/local
           key: bout-sundials-${{ matrix.config.os }}${{ matrix.config.build_petsc }}