diff --git a/pkgs/development/python-modules/mailmanclient/default.nix b/pkgs/development/python-modules/mailmanclient/default.nix
index e7a752663c6..6c52490dc0e 100644
--- a/pkgs/development/python-modules/mailmanclient/default.nix
+++ b/pkgs/development/python-modules/mailmanclient/default.nix
@@ -8,14 +8,14 @@
 
 buildPythonPackage rec {
   pname = "mailmanclient";
-  version = "3.3.4";
+  version = "3.3.5";
   format = "setuptools";
 
   disabled = pythonOlder "3.7";
 
   src = fetchPypi {
     inherit pname version;
-    hash = "sha256-0y31HXjvU/bwy0s0PcDOlrX1RdyTTnk41ceD4A0R4p4=";
+    hash = "sha256-Y1gcYEyn6sAhSJwVqsygaklY63b2ZXTG+rBerGVN2Fc=";
   };
 
   propagatedBuildInputs = [