diff --git a/.github/workflows/deploy-doc.yml b/.github/workflows/deploy-doc.yml
index df6c436..fb89fb8 100644
--- a/.github/workflows/deploy-doc.yml
+++ b/.github/workflows/deploy-doc.yml
@@ -34,7 +34,7 @@ jobs:
       - name: Setup OCaml
         uses: ocaml/setup-ocaml@v3
         with:
-          ocaml-compiler: "5.2.x"
+          ocaml-compiler: "5.3.x"
           opam-repositories: |
             default: https://github.com/ocaml/opam-repository.git
             mbarbin: https://github.com/mbarbin/opam-repository.git
diff --git a/.github/workflows/test-deploy-doc.yml b/.github/workflows/test-deploy-doc.yml
index 16fad49..af800a5 100644
--- a/.github/workflows/test-deploy-doc.yml
+++ b/.github/workflows/test-deploy-doc.yml
@@ -34,7 +34,7 @@ jobs:
       - name: Setup OCaml
         uses: ocaml/setup-ocaml@v3
         with:
-          ocaml-compiler: "5.2.x"
+          ocaml-compiler: "5.3.x"
           opam-repositories: |
             default: https://github.com/ocaml/opam-repository.git
             mbarbin: https://github.com/mbarbin/opam-repository.git