diff --git a/setup.py b/setup.py
index 5516b0e..e6716c1 100644
--- a/setup.py
+++ b/setup.py
@@ -43,7 +43,7 @@ setup(
         'dev': [
             'nose==1.3.7',
             'coveralls==3.0.1',
-            'flake8==3.9.0'
+            'flake8==3.9.1'
         ]
     },
     zip_safe=False