diff --git a/setup.py b/setup.py
index 6b6fc49..7ca6fd6 100644
--- a/setup.py
+++ b/setup.py
@@ -28,11 +28,10 @@ def get_file_contents(file_path):
       url='http://www.privacyidea.org',
       install_requires=['ldaptor',
                         'six',
-                        'future',
                         'Twisted',
                         'configobj',
                         'pyOpenSSL',
-                        'service-identity'],
+                        'zope.interface'],
       long_description=get_file_contents('README.md'),
       classifiers=[
           "Framework :: Twisted",