diff --git a/pkgs/development/ocaml-modules/magic-mime/default.nix b/pkgs/development/ocaml-modules/magic-mime/default.nix
index a48260ed38d6..a400e073f215 100644
--- a/pkgs/development/ocaml-modules/magic-mime/default.nix
+++ b/pkgs/development/ocaml-modules/magic-mime/default.nix
@@ -2,15 +2,14 @@
 
 buildDunePackage rec {
   pname = "magic-mime";
-  version = "1.2.0";
+  version = "1.3.1";
 
   src = fetchurl {
-    url = "https://github.com/mirage/ocaml-magic-mime/releases/download/v${version}/magic-mime-v${version}.tbz";
-    sha256 = "sha256-8SG2dQD43Zfi/J/V0BxzJeTIS8XAI3RCd5+9b6IGlPU=";
+    url = "https://github.com/mirage/ocaml-magic-mime/releases/download/v${version}/magic-mime-${version}.tbz";
+    hash = "sha256-4CNNA2Jduh76xY5X44dnLXWl6aYh/0ms/g9gnADxOwg=";
   };
 
   minimalOCamlVersion = "4.03";
-  useDune2 = true;
 
   meta = with lib; {
     description = "Convert file extensions to MIME types";