diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,14 +2,10 @@ Pillow==4.0.0
 Twisted==19.2.0
 coloredlogs==6.0
 colormath==3.0.0
-coverage==4.3.4
 freezegun==0.3.8
 genshi==0.7
-ipdb==0.10.2
-ipython==5.3.0
 klein==17.2.0
 mock==2.0.0
-mypy==0.701
 noise==1.2.2
 nose-watcher==0.1.3
 nose==1.3.7
@@ -30,12 +26,16 @@ watchdog==0.8.3
 webcolors==1.7
 yapf==0.27.0
 
+coverage==4.3.4
+ipdb==0.10.2
+ipython==5.3.0
+mypy==0.701
+flake8
+
 git+http://github.com/drewp/scales.git@448d59fb491b7631877528e7695a93553bfaaa93#egg=scales
 git+http://github.com/11craft/louie.git@f18bb71010c114eca9c6b88c96453340e3b39454#egg=louie
 git+http://github.com/webpy/webpy@ace0f8954c28311004b33c7a513c6e40a3c02470#egg=web
 https://github.com/drewp/cyclone/archive/python3.zip#egg=cyclone
 
 cycloneerr==0.3.0
-rdfdb==0.11.0
-
-
+rdfdb==0.13.0