diff --git a/requirements.txt b/requirements.txt
index 4b855830c3..6aad85ced8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,6 @@ croniter>=0.3.4 # MIT License
 cryptography!=1.3.0,>=1.0 # BSD/Apache-2.0
 debtcollector>=1.2.0 # Apache-2.0
 eventlet!=0.18.3,>=0.18.2 # MIT
-greenlet>=0.3.2 # MIT
 keystoneauth1>=2.16.0 # Apache-2.0
 keystonemiddleware>=4.12.0 # Apache-2.0
 lxml!=3.7.0,>=2.3 # BSD