diff --git a/var/spack/repos/builtin/packages/py-traits/package.py b/var/spack/repos/builtin/packages/py-traits/package.py
index 969227fbb7..dcf9d1907d 100644
--- a/var/spack/repos/builtin/packages/py-traits/package.py
+++ b/var/spack/repos/builtin/packages/py-traits/package.py
@@ -8,11 +8,13 @@
 
 
 class PyTraits(PythonPackage):
-    """Explicitly typed attributes for Python."""
+    """Observable typed attributes for Python classes."""
 
     homepage = "https://docs.enthought.com/traits"
     pypi = "traits/traits-6.0.0.tar.gz"
+    git = "https://github.com/enthought/traits.git"
 
+    version("6.4.1", sha256="78bb2ccafd60aff606515aac46de64668a0a81cb5c54c650b9877a841aa9e812")
     version("6.3.1", sha256="ebdd9b067a262045840a85e3ff34e1567ce4e9b6548c716cdcc82b5884ed9100")
     version("6.2.0", sha256="16fa1518b0778fd53bf0547e6a562b1787bf68c8f6b7995a13bd1902529fdb0c")
     version("6.0.0", sha256="dbcd70166feca434130a1193284d5819ca72ffbc8dbce8deeecc0cebb41a3bfb")