diff --git a/pkgs/development/python-modules/ttkbootstrap/default.nix b/pkgs/development/python-modules/ttkbootstrap/default.nix
index d0709ee6f13a..d507553e21e6 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 = "1.20.2";
+  version = "1.20.3";
   pyproject = true;
 
   src = fetchFromGitHub {
     owner = "israel-dryer";
     repo = "ttkbootstrap";
     tag = "v${version}";
-    hash = "sha256-NXfRKSwwyRYKPTQJ7wlBfY5IYuqBzuosZQNqB7dMqC4=";
+    hash = "sha256-S00XBfSBhnsxJ4KlffrKnurJTQIEepUnqBPV8tBUMsA=";
   };
 
   build-system = [