diff --git a/.travis.yml b/.travis.yml
index 5fc2718..4665c33 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,9 +1,11 @@
+dist: xenial
 language: python
 python:
     - 2.7
     - 3.4
     - 3.5
     - 3.6
+    - 3.7
     - nightly
 sudo: false
 install:
diff --git a/CHANGELOG b/CHANGELOG
index 7c85c2b..ece051e 100644
--- a/CHANGELOG
+++ b/CHANGELOG
@@ -1,3 +1,7 @@
+v0.6 (unreleased):
+
+- ...
+
 v0.5.4 (released May 15, 2019):
 
 - Fixed an unlikely crash in the C tokenizer when interrupted while parsing
diff --git a/appveyor.yml b/appveyor.yml
index 3d738e4..076fc21 100644
--- a/appveyor.yml
+++ b/appveyor.yml
@@ -1,6 +1,6 @@
 # This config file is used by appveyor.com to build Windows release binaries
 
-version: 0.5.4-b{build}
+version: 0.6.dev0-b{build}
 
 branches:
   only:
diff --git a/docs/changelog.rst b/docs/changelog.rst
index 808e9b9..948c9c1 100644
--- a/docs/changelog.rst
+++ b/docs/changelog.rst
@@ -1,6 +1,14 @@
 Changelog
 =========
 
+v0.6
+----
+
+Unreleased
+(`changes <https://github.com/earwig/mwparserfromhell/compare/v0.5.4...develop>`__):
+
+- ...
+
 v0.5.4
 ------
 
diff --git a/mwparserfromhell/__init__.py b/mwparserfromhell/__init__.py
index 4e4d440..e8aa944 100644
--- a/mwparserfromhell/__init__.py
+++ b/mwparserfromhell/__init__.py
@@ -29,7 +29,7 @@ outrageously powerful parser for `MediaWiki <http://mediawiki.org>`_ wikicode.
 __author__ = "Ben Kurtovic"
 __copyright__ = "Copyright (C) 2012-2019 Ben Kurtovic"
 __license__ = "MIT License"
-__version__ = "0.5.4"
+__version__ = "0.6.dev0"
 __email__ = "ben.kurtovic@gmail.com"
 
 from . import (compat, definitions, nodes, parser, smart_list, string_mixin,
diff --git a/scripts/release.sh b/scripts/release.sh
index aa497e7..71595c5 100755
--- a/scripts/release.sh
+++ b/scripts/release.sh
@@ -84,7 +84,7 @@ post_release() {
     echo
     echo "*** Release completed."
     echo "*** Update: https://github.com/earwig/mwparserfromhell/releases/tag/v$VERSION"
-    echo "*** Verify: https://pypi.python.org/pypi/mwparserfromhell"
+    echo "*** Verify: https://pypi.org/project/mwparserfromhell"
     echo "*** Verify: https://ci.appveyor.com/project/earwig/mwparserfromhell"
     echo "*** Verify: https://mwparserfromhell.readthedocs.io"
     echo "*** Press enter to sanity-check the release."
@@ -96,7 +96,7 @@ test_release() {
     echo "Checking mwparserfromhell v$VERSION..."
     echo -n "Creating a virtualenv..."
     virtdir="mwparser-test-env"
-    virtualenv -q $virtdir
+    python -m venv $virtdir
     cd $virtdir
     source bin/activate
     echo " done."
@@ -104,7 +104,7 @@ test_release() {
     pip -q install mwparserfromhell
     echo " done."
     echo -n "Checking version..."
-    reported_version=$(python -c 'print __import__("mwparserfromhell").__version__')
+    reported_version=$(python -c 'print(__import__("mwparserfromhell").__version__)')
     if [[ "$reported_version" != "$VERSION" ]]; then
         echo " error."
         echo "*** ERROR: mwparserfromhell is reporting its version as $reported_version, not $VERSION!"