diff --git a/requirements.txt b/requirements.txt
index a057b4b..2fb93e0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -20,7 +20,7 @@ termcolor==1.1.0
 thinc==6.5.2
 toolz==0.8.2
 tqdm==4.11.2
-ujson==1.35
+ujson==5.2.0
 websocket-client==0.40.0
 wrapt==1.10.10
 zmq==0.0.0