diff --git a/tox.ini b/tox.ini
index b0a799f2..289ad9a5 100644
--- a/tox.ini
+++ b/tox.ini
@@ -65,7 +65,7 @@ basepython = python3
 usedevelop = False
 skip_install = True
 deps =
-    flake8
+    flake8<3.6.0
 commands =
     flake8