diff --git a/requirements.txt b/requirements.txt
index 2284050..8400be3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,6 +4,6 @@
 Flask<1.0,>=0.10 # BSD
 dogpile.cache>=0.5.4 # BSD
 netaddr!=0.7.16,>=0.7.12 # BSD
-eventlet>=0.17.4 # MIT
+eventlet!=0.18.0,>=0.17.4 # MIT
 requests!=2.9.0,>=2.8.1 # Apache-2.0
 greenlet>=0.3.2 # MIT