diff --git a/requirements.txt b/requirements.txt
index 13ac8cd..69d1061 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -62,7 +62,7 @@ toml==0.10.0
 Twisted==16.4.1
 txaio==2.5.1
 typed-ast==1.4.1
-ujson==1.35
+ujson==5.4.0
 websocket-client==0.37.0
 xlrd==1.2.0
 xlwt==1.3.0