diff --git a/pkgs/development/python-modules/duecredit/default.nix b/pkgs/development/python-modules/duecredit/default.nix
index 053fd6504e41..1e24f9112920 100644
--- a/pkgs/development/python-modules/duecredit/default.nix
+++ b/pkgs/development/python-modules/duecredit/default.nix
@@ -7,23 +7,22 @@
 , vcrpy
 , citeproc-py
 , requests
-, six
 }:
 
 buildPythonPackage rec {
   pname = "duecredit";
-  version = "0.9.2";
+  version = "0.9.3";
   pyproject = true;
 
-  disabled = pythonOlder "3.6";
+  disabled = pythonOlder "3.8";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-Dg/Yfp5GzmyUMI6feAwgP+g22JYoQE+L9a+Wp0V77Rw=";
+    hash = "sha256-+DeOqQ0R+XUlkuSHySFj2oDZqf85mT64PAi/LtTso3I=";
   };
 
   nativeBuildInputs = [ setuptools ];
-  propagatedBuildInputs = [ citeproc-py requests six ];
+  propagatedBuildInputs = [ citeproc-py requests ];
 
   nativeCheckInputs = [ pytestCheckHook vcrpy ];
   disabledTests = [ "test_import_doi" ];  # tries to access network