diff --git a/.github/workflows/geant4.yml b/.github/workflows/geant4.yml
index 661f8edb..5c2e9449 100644
--- a/.github/workflows/geant4.yml
+++ b/.github/workflows/geant4.yml
@@ -63,7 +63,7 @@ jobs:
 
       - name: Cache Conda env
         id: cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: ${{ env.CONDA }}/envs
           key: