diff --git a/setup.py b/setup.py
index 1134e8ee..c84ed7e7 100644
--- a/setup.py
+++ b/setup.py
@@ -26,7 +26,7 @@ required = [
     'pew>=0.1.26',
     'pip>=9.0.1',
     'requests>2.18.0',
-    'flake8',
+    'flake8>=3.5.0',
     'urllib3>=1.21.1'
 ]