diff --git a/pkgs/development/ocaml-modules/cohttp/async.nix b/pkgs/development/ocaml-modules/cohttp/async.nix
index 93a040b6ec74..9a3b1b0e8923 100644
--- a/pkgs/development/ocaml-modules/cohttp/async.nix
+++ b/pkgs/development/ocaml-modules/cohttp/async.nix
@@ -28,7 +28,7 @@ buildDunePackage {
     src
     ;
 
-  duneVersion = "3";
+  minimalOCamlVersion = "4.14";
 
   buildInputs = [ ppx_sexp_conv ];