diff --git a/requirements.txt b/requirements.txt
index b6e9c76..41fc400 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -130,7 +130,7 @@ twilio==6.25.1
 Twisted==18.9.0
 typing==3.6.6
 tzlocal==1.5.1
-ujson==1.35
+ujson==5.4.0
 urllib3==1.24.1
 uvloop==0.12.2
 wcwidth==0.1.7