diff --git a/ppx_let.opam b/ppx_let.opam
index a97d14ef0..18009793b 100644
--- a/ppx_let.opam
+++ b/ppx_let.opam
@@ -14,7 +14,7 @@ depends: [
   "ppx_driver"
   "ocaml-migrate-parsetree" {>= "0.4"}
 ]
-available: [ ocaml-version >= "4.03.0" ]
+available: [ ocaml-version >= "4.04.1" ]
 descr: "
 Monadic let-bindings