diff --git a/.github/workflows/ocaml-4-ci.yml b/.github/workflows/ocaml-4-ci.yml
index 27dd912..2b95d5f 100644
--- a/.github/workflows/ocaml-4-ci.yml
+++ b/.github/workflows/ocaml-4-ci.yml
@@ -26,7 +26,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v5
+        uses: actions/checkout@v6
 
       - name: Setup OCaml
         uses: ocaml/setup-ocaml@v3