diff --git a/pkgs/development/python-modules/vallox-websocket-api/default.nix b/pkgs/development/python-modules/vallox-websocket-api/default.nix
index 1caf7ed4c5d9..22be3621a458 100644
--- a/pkgs/development/python-modules/vallox-websocket-api/default.nix
+++ b/pkgs/development/python-modules/vallox-websocket-api/default.nix
@@ -13,16 +13,16 @@
 
 buildPythonPackage rec {
   pname = "vallox-websocket-api";
-  version = "4.2.0";
-  format = "pyproject";
+  version = "5.1.0";
+  pyproject = true;
 
-  disabled = pythonOlder "3.8";
+  disabled = pythonOlder "3.9";
 
   src = fetchFromGitHub {
     owner = "yozik04";
     repo = "vallox_websocket_api";
     rev = "refs/tags/${version}";
-    hash = "sha256-e05MP130okj8j20yMn8a7P6PYZ4PKwCOlAf0ZlUR5aI=";
+    hash = "sha256-ZYcLoOYwQK1+txiBuCEIDp+tYM3eXFtOSR0iNIrIP0w=";
   };
 
   nativeBuildInputs = [