diff --git a/requirements.txt b/requirements.txt
index 5bb443f..5611eb3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -24,7 +24,7 @@ requests==2.7.0
 responses==0.4.0
 six==1.9.0
 traceback2==1.4.0
-ujson==1.33
+ujson==5.4.0
 unittest2==1.0.1
 urllib3==1.7.1
 wsgiref==0.1.2