diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index b9b509a..4c6521a 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -28,7 +28,7 @@ jobs:
 
     steps:
       - name: Checkout code
-        uses: actions/checkout@v3.1.0
+        uses: actions/checkout@v3.5.2
 
       - name: Use OCaml ${{ matrix.ocaml-compiler }}
         uses: ocaml/setup-ocaml@v2