diff --git a/lower-constraints.txt b/lower-constraints.txt
index 1f5a2892e..20610a2ed 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -13,15 +13,11 @@ doc8==0.6.0
 docutils==0.14
 extras==1.0.0
 fixtures==3.0.0
-flake8==2.5.5
-flake8-import-order==0.17.1
 future==0.18.2
-hacking==0.12.0
 idna==2.6
 iso8601==0.1.12
 keystoneauth1==3.4.0
 linecache2==1.0.0
-mccabe==0.2.1
 mock==2.0.0
 monotonic==1.4
 mox3==0.25.0
@@ -38,12 +34,9 @@ oslo.utils==3.36.0
 oslotest==3.2.0
 paramiko==2.0.0
 pbr==2.0.0
-pep8==1.5.7
 prettytable==0.7.2
 pyasn1==0.4.2
-pycodestyle==2.5.0
 pycparser==2.18
-pyflakes==0.8.1
 Pygments==2.2.0
 pyinotify==0.9.6
 pyOpenSSL==18.0.0
@@ -59,7 +52,6 @@ requestsexceptions==1.4.0
 restructuredtext-lint==1.1.3
 rfc3986==1.1.0
 setuptools==21.0.0
-six==1.11.0
 stestr==2.0.0
 stevedore==1.28.0
 testrepository==0.0.18