diff --git a/lower-constraints.txt b/lower-constraints.txt
index ecba25a5..965337a6 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -28,7 +28,6 @@ libvirt-python==3.7.0
 linecache2==1.0.0
 MarkupSafe==1.0
 mccabe==0.6.1
-mock==2.0.0
 mox3==0.20.0
 munch==2.1.0
 netifaces==0.10.9