diff --git a/setup.py b/setup.py
index f18d960..a07ae74 100644
--- a/setup.py
+++ b/setup.py
@@ -25,7 +25,7 @@ setup(
     packages=find_packages(exclude=('tests*', 'testing*')),
     install_requires=[
         # quickfix to prevent pycodestyle conflicts
-        'flake8==3.0.4',
+        'flake8==3.5.0',
         'autopep8==1.3.5',
         'pycodestyle==2.4.0',
         'pyyaml',