diff --git a/requirements.txt b/requirements.txt
index 4abdbcb..64e013f 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -125,7 +125,7 @@ tables==3.2.2
 toolz==0.7.4
 tornado==4.2.1
 traitlets==4.0.0
-ujson==1.33
+ujson==5.4.0
 unicodecsv==0.14.1
 urllib3==1.12
 Werkzeug==0.10.4