diff --git a/requirements-dev.txt b/requirements-dev.txt
index 7ac4ddd..9a7cbbc 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 -e .
-flake8==3.3.0
+flake8==3.4.1
 pytest==3.1.3
 pytest-cov==2.4.0
 coverage==4.3.4