diff --git a/.github/workflows/ocaml.yaml b/.github/workflows/ocaml.yaml
index 74fd577..64c8bf6 100644
--- a/.github/workflows/ocaml.yaml
+++ b/.github/workflows/ocaml.yaml
@@ -13,7 +13,7 @@ jobs:
             with-doc: true
     runs-on: ubuntu-latest
     steps:
-      - uses: actions/checkout@v3
+      - uses: actions/checkout@v4
       - uses: RedPRL/actions-ocaml@v2
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}