diff --git a/requirements-dev.txt b/requirements-dev.txt
index ee4e7a9..d690aa6 100644
--- a/requirements-dev.txt
+++ b/requirements-dev.txt
@@ -1,5 +1,5 @@
 -e .
-flake8==3.3.0
+flake8==3.4.1
 pytest==3.2.0
 pytest-cov==2.4.0
 coverage==4.3.4