diff --git a/tox.ini b/tox.ini
index d9d2bad..0fbc252 100644
--- a/tox.ini
+++ b/tox.ini
@@ -387,14 +387,14 @@
 [testenv:pep8]
 deps =
     {[testenv]deps}
-    autopep8
+    autopep8>=2.1.0
 commands =
     autopep8 --exit-code --max-line-length=79 --experimental --diff -r tempest setup.py
     flake8 {posargs}
     check-uuid
 
 [testenv:autopep8]
-deps = autopep8
+deps = autopep8>=2.1.0
 commands =
     {toxinidir}/tools/format.sh