diff --git a/pkgs/development/ocaml-modules/optint/default.nix b/pkgs/development/ocaml-modules/optint/default.nix
index 06729bb8799..d98f6cf5ee2 100644
--- a/pkgs/development/ocaml-modules/optint/default.nix
+++ b/pkgs/development/ocaml-modules/optint/default.nix
@@ -2,11 +2,11 @@
 
 buildDunePackage rec {
   minimalOCamlVersion = "4.07";
-  version = "0.2.0";
+  version = "0.3.0";
   pname = "optint";
   src = fetchurl {
     url = "https://github.com/mirage/optint/releases/download/v${version}/optint-${version}.tbz";
-    sha256 = "sha256-HcvgtrYDH3fbMwKMhxOP2zv5D5KRXjtmKd3rMKDTAAs=";
+    sha256 = "sha256-KVz/LBNLA4WxO6gdUAXZ+EG6QNSlAq7RDJl/I57xFHs=";
   };
 
   meta = {