diff --git a/var/spack/repos/builtin/packages/py-six/package.py b/var/spack/repos/builtin/packages/py-six/package.py
index 03bb484007..2fee459770 100644
--- a/var/spack/repos/builtin/packages/py-six/package.py
+++ b/var/spack/repos/builtin/packages/py-six/package.py
@@ -29,10 +29,11 @@ class PySix(PythonPackage):
     """Python 2 and 3 compatibility utilities."""
 
     homepage = "https://pypi.python.org/pypi/six"
-    url      = "https://pypi.io/packages/source/s/six/six-1.10.0.tar.gz"
+    url      = "https://pypi.io/packages/source/s/six/six-1.11.0.tar.gz"
 
     import_modules = ['six']
 
+    version('1.11.0', 'd12789f9baf7e9fb2524c0c64f1773f8')
     version('1.10.0', '34eed507548117b2ab523ab14b2f8b55')
     version('1.9.0',  '476881ef4012262dfc8adc645ee786c4')
     version('1.8.0',  '1626eb24cc889110c38f7e786ec69885')