diff --git a/lower-constraints.txt b/lower-constraints.txt
index 8ce8f9ea..887707f1 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -26,7 +26,6 @@ jsonschema==2.6.0
 keystoneauth1==3.4.0
 linecache2==1.0.0
 MarkupSafe==1.0
-mccabe==0.2.1
 monotonic==0.6
 mox3==0.20.0
 msgpack-python==0.4.0