diff --git a/requirements.txt b/requirements.txt
index bf92885a..3f8a3e95 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -14,7 +14,7 @@ oslo.utils>=3.18.0 # Apache-2.0
 # for the routing notifier
 PyYAML>=3.10.0 # MIT
 
-lxml>=2.3 # BSD
+lxml!=3.7.0,>=2.3 # BSD
 suds-jurko>=0.6 # LGPLv3+
 eventlet!=0.18.3,>=0.18.2 # MIT
 requests!=2.12.2,>=2.10.0 # Apache-2.0