diff --git a/pkgs/development/python-modules/defcon/default.nix b/pkgs/development/python-modules/defcon/default.nix
index 30853aa41a64..845993be7113 100644
--- a/pkgs/development/python-modules/defcon/default.nix
+++ b/pkgs/development/python-modules/defcon/default.nix
@@ -5,13 +5,13 @@
 
 buildPythonPackage rec {
   pname = "defcon";
-  version = "0.8.1";
+  version = "0.9.0";
 
   disabled = pythonOlder "3.6";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "1sj9yhwkyvzchglpy07pkx5362mwlap581ibv150b5l9s5mxn2j1";
+    sha256 = "140f51da51e9630a9fa11dfd34376c4e29785fdb0bddc2e371df5b36bec17b76";
     extension = "zip";
   };