diff --git a/pkgs/development/python-modules/pytools/default.nix b/pkgs/development/python-modules/pytools/default.nix
index a34924374819..31092705d0ff 100644
--- a/pkgs/development/python-modules/pytools/default.nix
+++ b/pkgs/development/python-modules/pytools/default.nix
@@ -10,11 +10,11 @@
 
 buildPythonPackage rec {
   pname = "pytools";
-  version = "2018.3";
+  version = "2018.4";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "26143e4ce415919272a5a8d05727bf5e026faa6536fe0ba85302e5b88ebae9f5";
+    sha256 = "f9746ef763ce4d7d59ee8506ee83dd684884e4b520244b67f253095decc8a876";
   };
 
   checkInputs = [ pytest ];