diff --git a/tox.ini b/tox.ini
index a616eaa..825542d 100644
--- a/tox.ini
+++ b/tox.ini
@@ -33,12 +33,12 @@ deps =
 
 [testenv:flake8]
 usedevelop = false
-basepython = python2.7
+basepython = python3.6
 commands = flake8
 deps = flake8
 
 [testenv:isort]
 usedevelop = false
-basepython = python2.7
+basepython = python3.6
 commands = isort --recursive --check-only --diff picklefield tests
 deps = isort==4.2.5