diff --git a/setup.py b/setup.py
index <HASH>..<HASH> 100755
--- a/setup.py
+++ b/setup.py
@@ -44,6 +44,7 @@ setup(name             = 'srp',
       download_url     = 'http://pypi.python.org/pypi/srp',
       long_description = long_description,
       provides         = ['srp'],
+      install_requires = ['six'],
       packages         = ['srp'],
       package_data     = {'srp' : ['doc/*.rst', 'doc/*.py']},
       license          = "MIT",
Added dependency on six to the package spec