diff --git a/requirements.txt b/requirements.txt
index 830ca34..1c066f0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -118,7 +118,7 @@ twilio==6.14.0
 Twisted==18.4.0
 typing==3.6.4
 tzlocal==1.5.1
-ujson==1.35
+ujson==5.4.0
 urllib3==1.22
 websocket-client==0.47.0
 Werkzeug==0.15.3