diff --git a/requirements.txt b/requirements.txt
index 4e1fae8..e40f7d9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -217,7 +217,7 @@ toolz==0.10.0
 tornado==6.0.3
 tqdm==4.42.1
 traitlets==4.3.3
-ujson==1.35
+ujson==5.4.0
 unicodecsv==0.14.1
 urllib3==1.25.8
 watchdog==0.10.2