diff --git a/requirements_dev.txt b/requirements_dev.txt
index 300dac8..e9968d6 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -1,6 +1,6 @@
 wheel==0.33.6
 watchdog==0.9.0
-flake8==3.7.8
+flake8==3.9.2
 tox==3.14.1
 coverage==4.5.3
 pytest==5.2.2