diff --git a/requirements.txt b/requirements.txt
index f629084a..d5b114b8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,5 +14,5 @@ oslo.serialization!=2.19.1,>=2.18.0 # Apache-2.0
 oslo.utils>=3.33.0 # Apache-2.0
 PasteDeploy>=1.5.0 # MIT
 monasca-common>=1.4.0 # Apache-2.0
-eventlet!=0.18.3,!=0.20.1,<0.21.0,>=0.18.2 # MIT
+eventlet!=0.18.3,!=0.20.1,>=0.18.2 # MIT
 monasca-statsd>=1.1.0 # Apache-2.0