diff --git a/pkgs/development/python-modules/ttls/default.nix b/pkgs/development/python-modules/ttls/default.nix
index bf1379dd2bcc..53a0566eaaf2 100644
--- a/pkgs/development/python-modules/ttls/default.nix
+++ b/pkgs/development/python-modules/ttls/default.nix
@@ -2,33 +2,29 @@
   lib,
   aiohttp,
   buildPythonPackage,
-  colour,
   fetchFromGitHub,
   poetry-core,
   pythonOlder,
-  setuptools,
 }:
 
 buildPythonPackage rec {
   pname = "ttls";
-  version = "1.8.3";
-  format = "pyproject";
+  version = "1.9.0";
+  pyproject = true;
 
   disabled = pythonOlder "3.8";
 
   src = fetchFromGitHub {
     owner = "jschlyter";
-    repo = pname;
+    repo = "ttls";
     rev = "refs/tags/v${version}";
-    hash = "sha256-1RctamOSnpZ+bcfwnCsj4OAR7KYzf0XQtSe7MTFMGy4=";
+    hash = "sha256-itGXZbQZ+HYpiwySLeGN3mPy3fgsxx0A9byOxIVpRBc=";
   };
 
-  nativeBuildInputs = [ poetry-core ];
+  build-system = [ poetry-core ];
 
-  propagatedBuildInputs = [
+  dependencies = [
     aiohttp
-    colour
-    setuptools
   ];
 
   # Module has no tests