diff --git a/pkgs/development/ocaml-modules/tsdl-ttf/default.nix b/pkgs/development/ocaml-modules/tsdl-ttf/default.nix
index 0ff1963fcaf..93bee8f1015 100644
--- a/pkgs/development/ocaml-modules/tsdl-ttf/default.nix
+++ b/pkgs/development/ocaml-modules/tsdl-ttf/default.nix
@@ -9,13 +9,15 @@
 
 buildDunePackage rec {
   pname = "tsdl-ttf";
-  version = "0.3.2";
+  version = "0.5";
+
+  duneVersion = "3";
 
   src = fetchFromGitHub {
     owner = "sanette";
     repo = pname;
     rev = version;
-    sha256 = "sha256-COBLF9K8thRROJJGeg4wxqrjB3aBa4CGYkf8HdAQ2o0";
+    hash = "sha256-ai9ChsA3HZzTxT9AuHsY1UIA2Q3U3CcOA7jRSG4MDsQ=";
   };
 
   buildInputs = [