diff --git a/.travis.yml b/.travis.yml
index ca8a3370..bfdb3d78 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -16,10 +16,10 @@ sudo: false
 #
 # https://github.com/travis-ci/apt-package-whitelist/blob/master/ubuntu-precise
 
-#addons:
-#    apt:
-#        packages:
-#            - graphviz
+addons:
+    apt:
+        packages:
+            - graphviz
 
 env:
     global:
diff --git a/CHANGES.rst b/CHANGES.rst
index 6178c718..f1bc5335 100644
--- a/CHANGES.rst
+++ b/CHANGES.rst
@@ -2,7 +2,7 @@
 ==================
 
 - Removed Python 2 support. This version is only compatible with Python 3.5
-  or later.
+  or later. [#185]
 
 0.1.3 (2019-03-24)
 ==================
diff --git a/ah_bootstrap.py b/ah_bootstrap.py
index 05185f47..5160023f 100644
--- a/ah_bootstrap.py
+++ b/ah_bootstrap.py
@@ -48,10 +48,7 @@
 from distutils import log
 from distutils.debug import DEBUG
 
-try:
-    from ConfigParser import ConfigParser, RawConfigParser
-except ImportError:
-    from configparser import ConfigParser, RawConfigParser
+from configparser import ConfigParser, RawConfigParser
 
 import pkg_resources