diff --git a/.gitignore b/.gitignore
index b11bdd6..33baecb 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,6 +1,7 @@
 *.egg-info
 *.pyc
 /.coverage
+/.python-version
 /.tox/
 /.venv/
 /build/
diff --git a/.travis.yml b/.travis.yml
index 70c1d3c..6a3e3ea 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,12 @@
 language: python
 python:
   - "2.7"
-  - "3.4"
   - "3.5"
+  - "3.6"
+  - "3.7"
+  - "3.8"
   - "pypy"
   - "pypy3"
-sudo: false
-matrix:
-  fast_finish: true
 
 install:
   - pip install wheel tox-travis
diff --git a/README.md b/README.md
index 8ce94c8..3b3b4c4 100644
--- a/README.md
+++ b/README.md
@@ -64,8 +64,8 @@ Local documentation can be built using [Sphinx][]:
 Python Version Compatibility
 ----------------------------
 
-[Travis CI][ci-home] automatically runs tests against python 2.7, 3.4, 3.5,
-pypy, and pypy3,
+[Travis CI][ci-home] automatically runs tests against Python 2.7, 3.5, 3.6,
+3.7, 3.8, pypy, and pypy3.
 
 Installation
 ------------
diff --git a/iptools/__init__.py b/iptools/__init__.py
index 8d21ce9..3a966f7 100644
--- a/iptools/__init__.py
+++ b/iptools/__init__.py
@@ -47,7 +47,7 @@ def next(iterable):
 from . import ipv4
 from . import ipv6
 
-__version__ = '0.7.0-dev'
+__version__ = '0.7.0'
 
 __all__ = (
     'IpRange',
@@ -399,7 +399,7 @@ def __iter__(self):
 
 
 class IpRangeList (object):
-    """
+    r"""
     List of IpRange objects.
 
     Converts a list of ip address and/or CIDR addresses into a list of IpRange
diff --git a/iptools/ipv6.py b/iptools/ipv6.py
index 9e4c696..073a427 100644
--- a/iptools/ipv6.py
+++ b/iptools/ipv6.py
@@ -412,12 +412,12 @@ def rfc19242long(s):
         return None
     if _RFC1924_REV is None:
         _RFC1924_REV = {v: k for k, v in enumerate(_RFC1924_ALPHABET)}
-    l = 0
+    x = 0
     for c in s:
-        l = l * 85 + _RFC1924_REV[c]
-    if l > MAX_IP:
+        x = x * 85 + _RFC1924_REV[c]
+    if x > MAX_IP:
         return None
-    return l
+    return x
 
 
 def validate_cidr(s):
diff --git a/setup.py b/setup.py
index 996ba0c..551a951 100644
--- a/setup.py
+++ b/setup.py
@@ -32,11 +32,11 @@
         'License :: OSI Approved :: BSD License',
         'Operating System :: OS Independent',
         'Programming Language :: Python',
-        'Programming Language :: Python :: 2.5',
-        'Programming Language :: Python :: 2.6',
         'Programming Language :: Python :: 2.7',
-        'Programming Language :: Python :: 3.2',
-        'Programming Language :: Python :: 3.3',
+        'Programming Language :: Python :: 3.5',
+        'Programming Language :: Python :: 3.6',
+        'Programming Language :: Python :: 3.7',
+        'Programming Language :: Python :: 3.8',
         'Topic :: Utilities',
         'Topic :: Internet',
     ],
diff --git a/tox.ini b/tox.ini
index a99d698..446681b 100644
--- a/tox.ini
+++ b/tox.ini
@@ -1,5 +1,5 @@
 [tox]
-envlist = py27, py34, py35, pypy, pypy3
+envlist = py27, py35, py36, py37, py38, pypy, pypy3
 
 [testenv]
 deps = -r{toxinidir}/tests/requirements.txt