diff --git a/requirements.txt b/requirements.txt
index 27e5e2bd88..62625ef251 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@ pbr!=2.1.0,>=2.0.0 # Apache-2.0
 Babel!=2.4.0,>=2.3.4 # BSD
 croniter>=0.3.4 # MIT License
 cryptography>=2.1 # BSD/Apache-2.0
-eventlet!=0.18.3,!=0.20.1,>=0.18.2 # MIT
+eventlet!=0.18.3,!=0.20.1,!=0.21.0,!=0.23.0,!=0.25.0,>=0.18.2 # MIT
 keystoneauth1>=3.4.0 # Apache-2.0
 keystonemiddleware>=4.17.0 # Apache-2.0
 lxml!=3.7.0,>=3.4.1 # BSD