diff --git a/pkgs/development/ocaml-modules/secp256k1-internal/default.nix b/pkgs/development/ocaml-modules/secp256k1-internal/default.nix
index f7d3c1e41c5..4a9a761ab30 100644
--- a/pkgs/development/ocaml-modules/secp256k1-internal/default.nix
+++ b/pkgs/development/ocaml-modules/secp256k1-internal/default.nix
@@ -11,16 +11,14 @@
 
 buildDunePackage rec {
   pname = "secp256k1-internal";
-  version = "0.2";
+  version = "0.3";
   src = fetchFromGitLab {
     owner = "nomadic-labs";
     repo = "ocaml-secp256k1-internal";
-    rev = "v${version}";
-    sha256 = "1g9fyi78nmmm19l2cggwj14m4n80rz7gmnh1gq376zids71s6qxv";
+    rev = version;
+    sha256 = "sha256-1wvQ4RW7avcGsIc0qgDzhGrwOBY0KHrtNVHCj2cgNzo=";
   };
 
-  useDune2 = true;
-
   minimalOCamlVersion = "4.08";
 
   propagatedBuildInputs = [