diff --git a/lower-constraints.txt b/lower-constraints.txt
index 7be58e1..bc4ec34 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -47,7 +47,6 @@
 requests==2.18.0
 requestsexceptions==1.2.0
 rfc3986==0.3.1
-six==1.15.0
 smmap==0.9.0
 stestr==2.0.0
 stevedore==1.20.0