Require service_identity.

Author: Lukasa

setup.py

@@ -31,9 +31,9 @@
 
 def resolve_install_requires():
     if py_version == (3,3):
-        return ['pyOpenSSL>=0.15']
+        return ['pyOpenSSL>=0.15', 'service_identity>=14.0.0']
     elif py_version == (2,7) and py_long_version < (2,7,9):
-        return ['pyOpenSSL>=0.15']
+        return ['pyOpenSSL>=0.15', 'service_identity>=14.0.0']
     return []
 
 packages = [