diff --git a/djangocms_installer/config/data.py b/djangocms_installer/config/data.py
index ecfb555..dd89cb2 100644
--- a/djangocms_installer/config/data.py
+++ b/djangocms_installer/config/data.py
@@ -188,7 +188,7 @@
 }
 
 DEFAULT_PROJECT_HEADER = """# -*- coding: utf-8 -*-
-import os
+import os  # isort:skip
 gettext = lambda s: s
 """
 STATICFILES_DEFAULT = """STATICFILES_DIRS = (
diff --git a/tox.ini b/tox.ini
index ccecec9..df70463 100644
--- a/tox.ini
+++ b/tox.ini
@@ -20,7 +20,8 @@ commands = flake8
 skip_install = true
 
 [testenv:isort]
-deps = isort<4.3
+deps = isort
+basepython = python3.6
 commands = isort -c -rc -df djangocms_installer
 skip_install = true