diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index baa7a5e..644890d 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -36,7 +36,7 @@ jobs:
       - run: sudo apt-get update
       - name: Restore opam cache
         id: opam-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: "~/.opam"
           key: opam-${{env.OCAML_COMILER_VERSION}}-${{hashFiles('.github/coq-ovn.opam.locked')}}
diff --git a/.github/workflows/refresh-cache.yml b/.github/workflows/refresh-cache.yml
index f4d1d53..6026376 100644
--- a/.github/workflows/refresh-cache.yml
+++ b/.github/workflows/refresh-cache.yml
@@ -21,7 +21,7 @@ jobs:
       - run: sudo apt-get update
       - name: Restore opam cache
         id: opam-cache
-        uses: actions/cache@v4
+        uses: actions/cache@v5
         with:
           path: "~/.opam"
           fail-on-cache-miss: true