diff --git a/debian/changelog b/debian/changelog
index 3c8ca33..8eb91cb 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,12 +1,13 @@
 flask-testing (0.4.2-2) UNRELEASED; urgency=medium
 
   * d/control: Set Vcs-* to salsa.debian.org
   * d/copyright: Use https protocol in Format field
+  * d/control: Deprecating priority extra as per policy 4.0.1
 
  -- Ondřej Nový <onovy@debian.org>  Tue, 13 Feb 2018 10:16:21 +0100
 
 flask-testing (0.4.2-1) unstable; urgency=low
 
   * Initial release (Closes: #807054).
 
  -- Nicolas Dandrimont <olasd@debian.org>  Wed, 20 Apr 2016 13:30:34 +0200
diff --git a/debian/control b/debian/control
index 5fc2080..fecc634 100644
--- a/debian/control
+++ b/debian/control
@@ -1,55 +1,54 @@
 Source: flask-testing
 Section: python
 Priority: optional
 Maintainer: Debian Python Modules Team <python-modules-team@lists.alioth.debian.org>
 Uploaders: Stefano Zacchiroli <zack@debian.org>, Nicolas Dandrimont <olasd@debian.org>
 Build-Depends: debhelper (>= 9), dh-python,
                python-all,
                python-blinker,
                python-flask,
                python-setuptools,
                python-twill,
                python3-all,
                python3-blinker,
                python3-flask,
                python3-setuptools,
                python3-sphinx,
 Standards-Version: 3.9.8
 Homepage: http://pythonhosted.org/Flask-Testing/
 Vcs-Git: https://salsa.debian.org/python-team/modules/flask-testing.git
 Vcs-Browser: https://salsa.debian.org/python-team/modules/flask-testing
 
 Package: python-flask-testing
 Architecture: all
 Depends: ${misc:Depends}, ${python:Depends},
 Recommends: ${python:Recommends}
 Suggests: ${python:Suggests}
 XB-Python-Egg-Name: Flask-Testing
 Description: unit testing utilities for the Flask micro web framework - Python 2.X
  Flask-Testing is an extension for the Flask micro web framework that provides
  unit testing helpers for Flask-based web applications.
  .
  This package contains the Python 2 modules for flask-testing
 
 Package: python3-flask-testing
 Architecture: all
 Depends: ${misc:Depends}, ${python3:Depends},
 Recommends: ${python3:Recommends}
 Suggests: ${python3:Suggests}
 XB-Python-Egg-Name: Flask-Testing
 Description: unit testing utilities for the Flask micro web framework
  Flask-Testing is an extension for the Flask micro web framework that provides
  unit testing helpers for Flask-based web applications.
  .
  This package contains the Python 3 modules for flask-testing
 
 Package: python-flask-testing-doc
 Section: doc
 Architecture: all
-Priority: extra
 Depends: ${misc:Depends}, ${sphinxdoc:Depends}
 Description: documentation for the Flask-Testing Python library - documentation
  Flask-Testing is an extension for the Flask micro web framework that provides
  unit testing helpers for Flask-based web applications.
  .
  This package contains the sphinx-generated API documentation