diff --git a/requirements.txt b/requirements.txt
index b70f876..35abbc4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,3 +4,4 @@ pandas==0.25.1
 mysql-connector-python==8.0.18
 numpy==1.16.5
 scikit-learn==0.21.3
+flake8==3.7.9