diff --git a/.travis.yml b/.travis.yml
index eba7eeb3c..a88e9f5ff 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -113,6 +113,7 @@ matrix:
 
     # macOS
     - os: osx
+      osx_image: xcode9.2
       env: PYTHON_VERSION='2.7'
       language: minimal
       sudo: required
diff --git a/docs/dev/release.rst b/docs/dev/release.rst
index 25e3a01f7..11bdc1e61 100644
--- a/docs/dev/release.rst
+++ b/docs/dev/release.rst
@@ -49,6 +49,16 @@ Step-by-step
       second prompt is the tag message, please complete this to include the
       release notes for this release.
 
+   .. note::
+
+      If ypu want to GPG sign the merge commit and the tag:
+
+      .. code-block:: bash
+
+          $ git commit --amend --gpg-sign  # sign merge commit
+          $ git tag --sign v1.0.0 --force  # regenerate tag
+
+
 #. **Draft a release on GitHub**
 
    * Go to https://github.com/gwpy/gwpy/releases/new
diff --git a/gwpy/signal/window.py b/gwpy/signal/window.py
index 58946db07..b4a68f12b 100644
--- a/gwpy/signal/window.py
+++ b/gwpy/signal/window.py
@@ -23,7 +23,10 @@
 
 from math import ceil
 
-from scipy.signal import windows as scipy_windows
+try:  # scipy 1.1.0rc1
+    from scipy.signal.windows import windows as scipy_windows
+except ImportError:  # scipy <= 1.0.x
+    from scipy.signal import windows as scipy_windows
 
 from scipy.special import expit
 
diff --git a/setup_utils.py b/setup_utils.py
index 216ef4942..013bbef66 100755
--- a/setup_utils.py
+++ b/setup_utils.py
@@ -34,7 +34,7 @@
 from distutils.command.clean import (clean as orig_clean, log, remove_tree)
 from distutils.command.bdist_rpm import bdist_rpm as distutils_bdist_rpm
 from distutils.errors import DistutilsArgError
-from distutils.version import LooseVersion
+from distutils.version import (LooseVersion, StrictVersion)
 
 from setuptools.command.bdist_rpm import bdist_rpm as _bdist_rpm
 from setuptools.command.sdist import sdist as _sdist
@@ -144,7 +144,7 @@ def finalize_options(self):
             raise DistutilsArgError(
                 "--format should be one of {!r}".format(self.FORMATS))
         if self.start_tag:
-            self.start_tag = self.start_tag.lstrip('v')
+            self.start_tag = self._tag_version(self.start_tag)
 
     def format_changelog_entry(self, tag):
         log.debug('    parsing changelog entry for {}'.format(tag))
@@ -178,11 +178,15 @@ def _format_entry_deb(self, tag):
                     name, version, message,
                     tagger.name, tagger.email, dstr, tz))
 
+    @staticmethod
+    def _tag_version(tag):
+        return StrictVersion(str(tag).lstrip('v'))
+
     def get_git_tags(self):
         import git
         repo = git.Repo()
         tags = repo.tags
-        tags.reverse()
+        tags.sort(key=self._tag_version, reverse=True)
         log.debug('found {} git tags'.format(len(tags)))
         return tags
 
@@ -190,7 +194,7 @@ def run(self):
         log.info('creating changelog')
         lines = []
         for tag in self.get_git_tags():
-            if self.start_tag and tag.name.lstrip('v') < self.start_tag:
+            if self.start_tag and self._tag_version(tag) < self.start_tag:
                 log.debug('reached start tag ({}), stopping'.format(
                     self.start_tag))
                 break