diff --git a/requirements-3.6.txt b/requirements-3.6.txt
index 451e3f9..a13be2d 100644
--- a/requirements-3.6.txt
+++ b/requirements-3.6.txt
@@ -82,7 +82,7 @@ tox==2.9.1
 tqdm==4.19.6
 traitlets==4.3.2
 tzlocal==1.5.1
-ujson==1.35
+ujson==5.2.0
 urllib3==1.22
 virtualenv==15.1.0
 watchdog==0.8.3