diff --git a/pkgs/development/python-modules/xmlschema/default.nix b/pkgs/development/python-modules/xmlschema/default.nix
index 3c3e3a07db27..9e27d760c19e 100644
--- a/pkgs/development/python-modules/xmlschema/default.nix
+++ b/pkgs/development/python-modules/xmlschema/default.nix
@@ -12,7 +12,7 @@
 
 buildPythonPackage rec {
   pname = "xmlschema";
-  version = "3.4.5";
+  version = "4.0.1";
   pyproject = true;
 
   disabled = pythonOlder "3.7";
@@ -21,7 +21,7 @@ buildPythonPackage rec {
     owner = "sissaschool";
     repo = "xmlschema";
     tag = "v${version}";
-    hash = "sha256-4PU3q3VU+H+Rho1qELTNJ+YJX5dF0u8N52TiYeFw8po=";
+    hash = "sha256-J2A1dBLo5LtO1ldRuopfTjaew38B27D4wE+y387bQvs=";
   };
 
   build-system = [ setuptools ];