diff --git a/pkgs/development/python-modules/pytools/default.nix b/pkgs/development/python-modules/pytools/default.nix
index f8f9ef27ff9..4add5ac5e85 100644
--- a/pkgs/development/python-modules/pytools/default.nix
+++ b/pkgs/development/python-modules/pytools/default.nix
@@ -11,12 +11,12 @@
 
 buildPythonPackage rec {
   pname = "pytools";
-  version = "2020.4";
+  version = "2020.4.3";
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "37db39ff11a1b5fc8aec875ae4ddb3d6c21aa0e95bddc9c841aa98e1631ae460";
+    sha256 = "21aa1fd942bc3bc54c8ae3b5e60c1f771e6db0817b7402fd802aa5964f20e629";
   };
 
   checkInputs = [ pytest ];