diff --git a/pkgs/development/python-modules/xmlschema/default.nix b/pkgs/development/python-modules/xmlschema/default.nix
index 58d50d7b6cf..7008814ba28 100644
--- a/pkgs/development/python-modules/xmlschema/default.nix
+++ b/pkgs/development/python-modules/xmlschema/default.nix
@@ -5,25 +5,20 @@
 }:
 
 buildPythonPackage rec {
-  version = "1.5.3";
+  version = "1.6.2";
   pname = "xmlschema";
 
   src = fetchFromGitHub {
     owner = "sissaschool";
     repo = "xmlschema";
     rev = "v${version}";
-    sha256 = "0pv8zdz03wjnjwrgjr5pc3q69h7zh51h0iwgwxwl65qi1r6ydk54";
+    sha256 = "sha256-GL2PlHxKDSEsZwHPBAy+tjBSbKyvlbXUWwXakKPmzSs=";
   };
 
   propagatedBuildInputs = [ elementpath ];
 
   checkInputs = [ lxml pytest ];
 
-  postPatch = ''
-    substituteInPlace setup.py \
-      --replace "elementpath~=2.0.0" "elementpath~=2.0"
-  '';
-
   # Ignore broken fixtures, and tests for files which don't exist.
   # For darwin, we need to explicity say we can't reach network
   checkPhase = ''