diff --git a/debian/changelog b/debian/changelog
index 77a6f2a..56c1866 100644
--- a/debian/changelog
+++ b/debian/changelog
@@ -1,14 +1,15 @@
 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
   * Convert git repository from git-dpm to gbp layout
+  * Use 'python3 -m sphinx' instead of sphinx-build for building docs
 
  -- 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/rules b/debian/rules
index 0d22a8e..c157d0d 100755
--- a/debian/rules
+++ b/debian/rules
@@ -1,12 +1,12 @@
 #! /usr/bin/make -f
 
 export PYBUILD_NAME=flask-testing
 %:
 	dh $@ --with python2,python3,sphinxdoc --buildsystem=pybuild
 
 override_dh_auto_build:
 	dh_auto_build
 	cd docs && \
 	PYTHONPATH=$(CURDIR) http_proxy= https_proxy= \
-	sphinx-build -N -E -T -b html . $(CURDIR)/.pybuild/docs/html/
+	python3 -m sphinx -N -E -T -b html . $(CURDIR)/.pybuild/docs/html/
 	rm -rf $(CURDIR)/.pybuild/docs/html/.doctrees