diff --git a/requirements.txt b/requirements.txt
index 6f7c08a4..2718234a 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,4 +1,5 @@
 pymongo 
 websocket-client
 msgpack-python
-qdarkstyle
\ No newline at end of file
+qdarkstyle
+SortedContainers
\ No newline at end of file