diff --git a/requirements.txt b/requirements.txt
index 7943274..8da0a64 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,5 +24,5 @@ pytest-xdist==1.20.1
 pytz==2018.9
 requests==2.21.0
 six==1.11.0
-ujson==1.35
+ujson==5.2.0
 urllib3==1.24.2