diff --git a/var/spack/repos/builtin/packages/py-traits/package.py b/var/spack/repos/builtin/packages/py-traits/package.py
index 3fd2871b3e3..54c248df07c 100644
--- a/var/spack/repos/builtin/packages/py-traits/package.py
+++ b/var/spack/repos/builtin/packages/py-traits/package.py
@@ -10,6 +10,7 @@ class PyTraits(PythonPackage):
     homepage = "https://docs.enthought.com/traits"
     pypi = "traits/traits-6.0.0.tar.gz"
 
+    version('6.3.1', sha256='ebdd9b067a262045840a85e3ff34e1567ce4e9b6548c716cdcc82b5884ed9100')
     version('6.2.0', sha256='16fa1518b0778fd53bf0547e6a562b1787bf68c8f6b7995a13bd1902529fdb0c')
     version('6.0.0', sha256='dbcd70166feca434130a1193284d5819ca72ffbc8dbce8deeecc0cebb41a3bfb')