diff --git a/requirements.txt b/requirements.txt
index 73b53e9..b9c9655 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -62,7 +62,7 @@ tornado==4.3
 Twisted-Core==13.2.0
 Twisted-Names==13.2.0
 Twisted-Web==13.2.0
-ujson==2.0.3
+ujson==5.4.0
 urllib3==1.7.1
 wadllib==1.3.2
 Werkzeug==0.10