diff --git a/pkgs/development/python-modules/ttkbootstrap/default.nix b/pkgs/development/python-modules/ttkbootstrap/default.nix
index 458ae0b51d69..626030ea4d8a 100644
--- a/pkgs/development/python-modules/ttkbootstrap/default.nix
+++ b/pkgs/development/python-modules/ttkbootstrap/default.nix
@@ -9,14 +9,14 @@
 
 buildPythonPackage rec {
   pname = "ttkbootstrap";
-  version = "1.12.1";
-  format = "setuptools";
+  version = "1.14.2";
+  pyproject = true;
 
   src = fetchFromGitHub {
     owner = "israel-dryer";
     repo = "ttkbootstrap";
     tag = "v${version}";
-    hash = "sha256-Pkp45lB1Xeu9ZoLjKS8aSW2By/k3ID1qwMig/jdYHh4=";
+    hash = "sha256-D1Gx+gP6xbeOhKcjb2uhwhHlYFhma9y04tp0ibJCw6g=";
   };
 
   build-system = [
@@ -27,6 +27,8 @@ buildPythonPackage rec {
     pillow
   ];
 
+  pythonRelaxDeps = [ "pillow" ];
+
   # As far as I can tell, all tests require a display and are not normal-ish pytests
   # but appear to just be python scripts that run demos of components?
   doCheck = false;