diff --git a/etc/requirements.txt b/etc/requirements.txt
index fd757aa5..2305cd33 100644
--- a/etc/requirements.txt
+++ b/etc/requirements.txt
@@ -19,7 +19,6 @@ pandas==0.16.1
 patsy==0.4.0
 statsmodels==0.6.1
 
-# Don't use 2.4.0.
 python-dateutil==2.4.2
 six==1.9.0