diff --git a/pkgs/development/python-modules/twisted/default.nix b/pkgs/development/python-modules/twisted/default.nix
index 49e936c1cc12..10b25460cefc 100644
--- a/pkgs/development/python-modules/twisted/default.nix
+++ b/pkgs/development/python-modules/twisted/default.nix
@@ -15,12 +15,12 @@
 }:
 buildPythonPackage rec {
   pname = "Twisted";
-  version = "18.7.0";
+  version = "18.9.0";
 
   src = fetchPypi {
     inherit pname version;
     extension = "tar.bz2";
-    sha256 = "95ae985716e8107816d8d0df249d558dbaabb677987cc2ace45272c166b267e4";
+    sha256 = "294be2c6bf84ae776df2fc98e7af7d6537e1c5e60a46d33c3ce2a197677da395";
   };
 
   propagatedBuildInputs = [ zope_interface incremental automat constantly hyperlink pyhamcrest attrs ];