diff --git a/requirements.txt b/requirements.txt
index 53960a8..cb1438c 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,6 +2,6 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-pbr>=1.6
-requests!=2.9.0,>=2.8.1
-six>=1.9.0
+pbr>=1.6 # Apache-2.0
+requests!=2.9.0,>=2.8.1 # Apache-2.0
+six>=1.9.0 # MIT
diff --git a/test-requirements.txt b/test-requirements.txt
index 87c1c20..506a68b 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -5,4 +5,4 @@
 hacking<0.11,>=0.10.0
 
 # this is required for the docs build jobs
-sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
+sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2 # BSD