diff --git a/sideboard/lib/_cp.py b/sideboard/lib/_cp.py
index 44cac9b..7e1e7e3 100644
--- a/sideboard/lib/_cp.py
+++ b/sideboard/lib/_cp.py
@@ -16,6 +16,7 @@
     from cherrypy.lib.sessions import Session
     import redis
     import pickle
+    import threading
     from redis import Sentinel
 
     class RedisSession(Session):