diff --git a/pkgs/development/python-modules/more-itertools/default.nix b/pkgs/development/python-modules/more-itertools/default.nix
index e618f039ebd..6a58a6a8a28 100644
--- a/pkgs/development/python-modules/more-itertools/default.nix
+++ b/pkgs/development/python-modules/more-itertools/default.nix
@@ -8,11 +8,11 @@
 
 buildPythonPackage rec {
   pname = "more-itertools";
-  version = "4.0.1";
+  version = "4.2.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0cadwsr97c80k18if7qy5d8j8l1zj3yhnkm6kbngk0lpl7pxq8ax";
+    sha256 = "2b6b9893337bfd9166bee6a62c2b0c9fe7735dcf85948b387ec8cba30e85d8e8";
   };
 
   checkInputs = [ nose ];