diff --git a/pkgs/development/tools/ocaml/opam-publish/default.nix b/pkgs/development/tools/ocaml/opam-publish/default.nix
index ce0a807cc56e..9204ecdd12f1 100644
--- a/pkgs/development/tools/ocaml/opam-publish/default.nix
+++ b/pkgs/development/tools/ocaml/opam-publish/default.nix
@@ -15,17 +15,15 @@ in
 
 buildDunePackage rec {
   pname = "opam-publish";
-  version = "2.3.0";
+  version = "2.3.1";
 
   src = fetchFromGitHub {
     owner = "ocaml-opam";
     repo = pname;
     rev = version;
-    sha256 = "sha256-CiZOljFBUUC3ExGSzzTATGqmxKjbzjRlL4aaL/fx9zI=";
+    hash = "sha256-ll6G9L7zAw53R7FxvZDBL300b+YElzpBygbiIWB3FUU=";
   };
 
-  duneVersion = "3";
-
   buildInputs = [
     cmdliner
     lwt_ssl