diff --git a/tox.ini b/tox.ini
index 7e3d3ed4..637284fc 100644
--- a/tox.ini
+++ b/tox.ini
@@ -55,7 +55,7 @@ commands =
 basepython = python3
 usedevelop = False
 deps =
-    flake8<3.6.0
+    flake8
 description =
     Run style checks
 commands =
@@ -65,8 +65,9 @@ commands =
 [flake8]
 show-source = True
 exclude = .venv,.git,.tox,dist,doc,*lib/python*,*egg,build,release-tag-*
+# W504 line break after binary operator
 # H102 Apache License format
-ignore = H102
+ignore = W504,H102
 
 [testenv:venv]
 commands = {posargs}