diff --git a/pkgs/development/python-modules/pytools/default.nix b/pkgs/development/python-modules/pytools/default.nix
index 41eac5d2044..37bfee1d246 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 = "2018.5.2";
+  version = "2019.1";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "3b3f41e1235b579dc4f4a3d6f5f8ae187841968e72a4f73ac481c6bfe4c1668b";
+    sha256 = "f6972030e6c97089e49b832fd1f4e7959aee89bb6db929aaa3bde2553d78872b";
   };
 
   checkInputs = [ pytest ];