diff --git a/requirements.txt b/requirements.txt
index 0fb518b..5c96b7a 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -37,6 +37,7 @@ pyparsing>=2.0.3
 voluptuous>=0.8.7
 MySQL-python>=1.2.3
 eventlet
-simport
+greenlet
+simport>=0.0.dev0
 kafka-python>=0.9.1,<0.9.3
 requests>=1.1