diff --git a/requirements.txt b/requirements.txt
index 6d3a940..45ce7aa 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,6 +8,6 @@ itsdangerous==0.24
 Jinja2==2.10
 MarkupSafe==1.0
 requests==2.18.4
-ujson==1.35
+ujson==5.4.0
 urllib3==1.22
 Werkzeug==0.14.1