diff --git a/pkgs/development/ocaml-modules/mdx/default.nix b/pkgs/development/ocaml-modules/mdx/default.nix
index e5132d64d4d5..cd9cb2370d39 100644
--- a/pkgs/development/ocaml-modules/mdx/default.nix
+++ b/pkgs/development/ocaml-modules/mdx/default.nix
@@ -5,12 +5,12 @@
 
 buildDunePackage rec {
   pname = "mdx";
-  version = "1.11.1";
+  version = "2.1.0";
   useDune2 = true;
 
   src = fetchurl {
     url = "https://github.com/realworldocaml/mdx/releases/download/${version}/mdx-${version}.tbz";
-    sha256 = "sha256:1q6169gmynnbrvlnzlmx7lpd6hwv6vwxg5j8ibc88wgs5s0r0fb0";
+    sha256 = "sha256-ol1zy8LODDYdcnv/jByE0pnqJ5ujQuMALq3v9y7td/o=";
   };
 
   nativeBuildInputs = [ cppo ];