diff --git a/pkgs/development/python-modules/ttkbootstrap/default.nix b/pkgs/development/python-modules/ttkbootstrap/default.nix
index 626030ea4d8a..df2b776f5d8d 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 = "1.14.2";
+  version = "1.20.0";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "israel-dryer";
     repo = "ttkbootstrap";
     tag = "v${version}";
-    hash = "sha256-D1Gx+gP6xbeOhKcjb2uhwhHlYFhma9y04tp0ibJCw6g=";
+    hash = "sha256-CahjPHHcCWmZDTIWotPhMCEEIoCqnPCGpB9q/Cu7/ok=";
   };
 
   build-system = [