diff --git a/setup.cfg b/setup.cfg
index bc3ebe8..6ea13e6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -16,9 +16,8 @@ classifier =
     Programming Language :: Python :: 2
     Programming Language :: Python :: 2.7
     Programming Language :: Python :: 3
-    Programming Language :: Python :: 3.3
-    Programming Language :: Python :: 3.5
     Programming Language :: Python :: 3.6
+    Programming Language :: Python :: 3.7
 
 [files]
 packages =
diff --git a/tox.ini b/tox.ini
index a239e2d..b762f47 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,6 +1,6 @@
 [tox]
 minversion = 2.0
-envlist = py36,py35,py27,pypy,pep8
+envlist = py37,py36,py27,pypy,pep8
 skipsdist = True
 
 [testenv]