diff --git a/requirements.txt b/requirements.txt
index d04c4c8..6f4816e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -110,7 +110,7 @@ texttable==1.6.2
 toml==0.10.0
 tornado==6.0.4
 traitlets==4.3.3
-ujson==1.35
+ujson==5.2.0
 urllib3==1.25.9
 validators==0.15.0
 watchdog==0.10.2