diff --git a/.github/workflows/build-and-test.yml b/.github/workflows/build-and-test.yml
index 99115cd..cc357ae 100644
--- a/.github/workflows/build-and-test.yml
+++ b/.github/workflows/build-and-test.yml
@@ -35,7 +35,7 @@ jobs:
           fetch-depth: 2
 
       - name: setup-ocaml
-        uses: ocaml/setup-ocaml@master
+        uses: ocaml/setup-ocaml@v2
         with:
           ocaml-compiler: ${{ matrix.ocaml-compiler }}