diff --git a/lower-constraints.txt b/lower-constraints.txt
index 70e01b67..a32a60e0 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -60,6 +60,5 @@ tabulate==0.8.1
 testrepository==0.0.18
 testtools==2.2.0
 traceback2==1.4.0
-ujson==1.35
 unittest2==1.1.0
 wrapt==1.7.0