diff --git a/orec.opam b/orec.opam
index 0806e3e..f7939fe 100644
--- a/orec.opam
+++ b/orec.opam
@@ -14,4 +14,5 @@ build:[
 
 depends: [
   "dune" {>= "1.0" }
+  "ocaml" {>= "4.14"}
   ]