diff --git a/lower-constraints.txt b/lower-constraints.txt
index d61be6d30..6799df562 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -31,7 +31,6 @@ eventlet==0.26.1
 extras==1.0.0
 fasteners==0.14.1
 fixtures==3.0.0
-flake8==2.5.5
 Flask==0.10
 funcparserlib==0.3.6
 future==0.16.0
@@ -57,7 +56,6 @@ linecache2==1.0.0
 logutils==0.3.5
 Mako==1.0.7
 MarkupSafe==1.1.1
-mccabe==0.2.1
 monasca-statsd==1.4.0
 monotonic==1.4
 mox3==0.25.0
@@ -96,7 +94,6 @@ Paste==2.0.2
 PasteDeploy==1.5.0
 pbr==2.0.0
 pecan==1.0.0
-pep8==1.5.7
 pika-pool==0.1.3
 pika==0.10.0
 Pillow==5.0.0
@@ -105,7 +102,6 @@ psutil==5.4.3
 pyasn1==0.4.2
 pycadf==2.7.0
 pycparser==2.18
-pyflakes==0.8.1
 Pygments==2.2.0
 pyinotify==0.9.6
 pymemcache==1.2.9