diff --git a/requirements.txt b/requirements.txt
index 454c56fda..d98f76b24 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -33,3 +33,4 @@ SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT
 stevedore>=1.20.0 # Apache-2.0
 docker>=2.0.0 # Apache-2.0
 netaddr!=0.7.16,>=0.7.13 # BSD
+websockify>=0.8.0 # LGPLv3