diff --git a/.github/workflows/workflow.yml b/.github/workflows/workflow.yml
index b16110c..aae8383 100644
--- a/.github/workflows/workflow.yml
+++ b/.github/workflows/workflow.yml
@@ -48,7 +48,8 @@ jobs:
       - name: Install OCaml
         uses: ocaml/setup-ocaml@v2
         with:
-          ocaml-compiler: "4.14"
+          ocaml-compiler: "5.1"
+          dune-cache: true
 
       - uses: ocaml/setup-ocaml/lint-fmt@v2
 
diff --git a/.ocamlformat b/.ocamlformat
new file mode 100644
index 0000000..189eda3
--- /dev/null
+++ b/.ocamlformat
@@ -0,0 +1,3 @@
+profile = ocamlformat
+wrap-comments = true
+version = 0.26.1
diff --git a/doc/ocaml/playground.ml b/doc/ocaml/playground.ml
index 81aa4bf..7544e2d 100644
--- a/doc/ocaml/playground.ml
+++ b/doc/ocaml/playground.ml
@@ -22,7 +22,7 @@
 
 open Js_of_ocaml
 
-let exec_string (str: string) =
+let exec_string (str : string) =
   let state = Lice.LState.empty in
   let state = Lice.LState.do_string state str in
   state
@@ -30,6 +30,7 @@ let exec_string (str: string) =
 let _ =
   Js.export "Lice"
     (object%js
-       method doString (code: string) = exec_string code
-       method bytecodeViewer = Lice.bytecode_viewer 
-     end)
+       method doString (code : string) = exec_string code
+
+       method bytecodeViewer = Lice.bytecode_viewer
+    end )