diff --git a/requirements.txt b/requirements.txt
index 67ca479ef1..11052b2142 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -70,6 +70,7 @@ Routes>=1.12.3
 setuptools_git>=0.4
 simplejson>=2.0.9
 six
+sockjs-tornado>=1.0.0,<2.0.0
 SQLAlchemy>=0.7,<=0.7.99
 sqlalchemy-migrate>=0.7
 stevedore>=0.10