diff --git a/requirements.txt b/requirements.txt
index c35b5c1ff..43e015181 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 anyjson>=0.3.3
-appdirs>=1.3.0
+appdirs>=1.3.0 # MIT License
 dogpile.cache>=0.5.3
 httplib2>=0.7.5
 lxml>=2.3