docs/Makefile                 | 2 +-
 setup.py                      | 3 ++-
 tools/mozilla/buildxpi.py     | 3 ++-
 tools/mozilla/get_moz_enUS.py | 3 ++-
 4 files changed, 7 insertions(+), 4 deletions(-)

diff --git a/docs/Makefile b/docs/Makefile
index 3b57884..7f71b55 100644
--- a/docs/Makefile
+++ b/docs/Makefile
@@ -3,7 +3,7 @@
 
 # You can set these variables from the command line.
 SPHINXOPTS    =
-SPHINXBUILD   = sphinx-build
+SPHINXBUILD   = sphinx-build-3
 PAPER         =
 BUILDDIR      = _build
 
diff --git a/setup.py b/setup.py
index 6fbed7f..a0ca6f0 100755
--- a/setup.py
+++ b/setup.py
@@ -1,4 +1,5 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
 #
 # Copyright 2006-2013 Zuza Software Foundation
 #
diff --git a/tools/mozilla/buildxpi.py b/tools/mozilla/buildxpi.py
index 73f0c4e..827bfc2 100755
--- a/tools/mozilla/buildxpi.py
+++ b/tools/mozilla/buildxpi.py
@@ -1,4 +1,5 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
 #
 # Copyright 2008 Zuza Software Foundation
 #
diff --git a/tools/mozilla/get_moz_enUS.py b/tools/mozilla/get_moz_enUS.py
index bde54ee..44785bd 100755
--- a/tools/mozilla/get_moz_enUS.py
+++ b/tools/mozilla/get_moz_enUS.py
@@ -1,4 +1,5 @@
-#!/usr/bin/env python
+#!/usr/bin/python3
+# -*- coding: utf-8 -*-
 #
 # Copyright 2008 Zuza Software Foundation
 #