diff --git a/lower-constraints.txt b/lower-constraints.txt
index 3afef453..1170f095 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -81,7 +81,6 @@ requestsexceptions==1.2.0
 rfc3986==0.3.1
 semantic-version==2.3.1
 simplejson==3.5.1
-six==1.10.0
 snowballstemmer==1.2.1
 Sphinx==1.6.2
 sphinxcontrib-websupport==1.0.1
diff --git a/requirements.txt b/requirements.txt
index 56210ff3..9cadeb2d 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,6 @@ PrettyTable<0.8,>=0.7.2 # BSD
 python-glanceclient>=2.8.0 # Apache-2.0
 python-keystoneclient>=3.8.0 # Apache-2.0
 iso8601>=0.1.11 # MIT
-six>=1.10.0 # MIT
 Babel!=2.4.0,>=2.3.4 # BSD
 pyOpenSSL>=17.1.0 # Apache-2.0
 requests>=2.14.2 # Apache-2.0