diff --git a/pkgs/by-name/ma/matugen/package.nix b/pkgs/by-name/ma/matugen/package.nix
index cb03c977b799..d96f127310ae 100644
--- a/pkgs/by-name/ma/matugen/package.nix
+++ b/pkgs/by-name/ma/matugen/package.nix
@@ -6,22 +6,22 @@
 
 rustPlatform.buildRustPackage (finalAttrs: {
   pname = "matugen";
-  version = "3.1.0";
+  version = "4.0.0";
 
   src = fetchFromGitHub {
     owner = "InioX";
     repo = "matugen";
     tag = "v${finalAttrs.version}";
-    hash = "sha256-TD9XyqFdLIOLRZM7ozQ8gz4PyEQbLGLxB4MbzjLccg4=";
+    hash = "sha256-2jcqAU8QutF8AE15LYwd8cy7KjayGxUGHxvWnqAiS5M=";
   };
 
-  cargoHash = "sha256-OdJxr01wHqPHgEGIVrLcUv5h1JaYrY1zW9NrYO114OM=";
+  cargoHash = "sha256-RlzY0eaYrEVkO7ozzgfLHxKB2jy4nSYda9Z0jrqiUVA=";
 
   meta = {
     description = "Material you color generation tool";
     homepage = "https://github.com/InioX/matugen";
     changelog = "https://github.com/InioX/matugen/blob/${finalAttrs.src.rev}/CHANGELOG.md";
-    license = lib.licenses.gpl2Only;
+    license = lib.licenses.gpl2Plus;
     maintainers = with lib.maintainers; [ lampros ];
     mainProgram = "matugen";
   };