diff --git a/pkgs/development/python-modules/traitsui/default.nix b/pkgs/development/python-modules/traitsui/default.nix
index 617ba227c41..b4d009e630e 100644
--- a/pkgs/development/python-modules/traitsui/default.nix
+++ b/pkgs/development/python-modules/traitsui/default.nix
@@ -4,11 +4,11 @@
 
 buildPythonPackage rec {
   pname = "traitsui";
-  version = "6.1.3";
+  version = "7.0.0";
 
   src = fetchPypi {
     inherit pname version;
-    sha256 = "0kw1xy5ax6l0lzmk7pfzjw6qs0idv78k3118my7cbvw1n5iiff28";
+    sha256 = "e569f359a58e4567b14265abe89b3de4b0f95bbbf8f491a9a7d45219628735ec";
   };
 
   propagatedBuildInputs = [ traits pyface six ];