diff --git a/.github/workflows/ci.yml b/.github/workflows/ci.yml
index c9f7566..e9f2ef8 100644
--- a/.github/workflows/ci.yml
+++ b/.github/workflows/ci.yml
@@ -34,7 +34,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v4
+        uses: actions/checkout@v6
         with:
           lfs: true # https://github.com/ocaml/setup-ocaml/issues/895#issuecomment-2477062336