diff --git a/requirements.txt b/requirements.txt
--- a/requirements.txt
+++ b/requirements.txt
@@ -29,10 +29,11 @@ udmx-pyusb==2.0.0
 yapf==0.27.0
 
 coverage==4.3.4
+flake8
+hunter
 ipdb==0.10.2
 ipython==5.3.0
 mypy==0.701
-flake8
 typing_extensions
 
 git+http://github.com/drewp/scales.git@3f2609c#egg=scales