diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,13 @@
+autopep8==1.3.1
 click==6.7
+flake8==3.3.0
 Flask==0.12.2
 itsdangerous==0.24
 Jinja2==2.9.6
 MarkupSafe==1.0
+mccabe==0.6.1
+pep8==1.7.0
+pycodestyle==2.3.1
+pyflakes==1.5.0
 sqlite3==0.0.0
 Werkzeug==0.12.2