diff --git a/pkgs/development/ocaml-modules/biocaml/default.nix b/pkgs/development/ocaml-modules/biocaml/default.nix
index 006316295e4..5fa482acc6d 100644
--- a/pkgs/development/ocaml-modules/biocaml/default.nix
+++ b/pkgs/development/ocaml-modules/biocaml/default.nix
@@ -8,6 +8,7 @@ buildDunePackage rec {
   version = "0.11.2";
 
   minimalOCamlVersion = "4.11";
+  duneVersion = "3";
 
   src = fetchFromGitHub {
     owner = "biocaml";