Fix: Crashbug that was caused by an import of an
outdated module that was removed from Gevent 1.3 that
was released two days ago.

Change-Id: I44dff2b468456ed2c24fa8e326ebc535bb04344b
Signed-off-by: peusterm <manuel.peuster@uni-paderborn.de>
diff --git a/setup.py b/setup.py
index a28df09..94f632f 100755
--- a/setup.py
+++ b/setup.py
@@ -57,7 +57,8 @@
           'requests',
           'prometheus_client',
           'ipaddress',
-          'simplejson'
+          'simplejson',
+          'gevent'
       ],
       zip_safe=False,
       entry_points={