diff --git a/requirements.txt b/requirements.txt
index df49472..2d2aaad 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,5 +2,5 @@
 # of appearance. Changing the order has an impact on the overall integration
 # process, which may cause wedges in the gate later.
 
-eventlet>=0.17.4
-six>=1.9.0
+eventlet!=0.18.0,>=0.17.4 # MIT
+six>=1.9.0 # MIT
diff --git a/test-requirements.txt b/test-requirements.txt
index 2420e00..dec9355 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -3,10 +3,10 @@
 # process, which may cause wedges in the gate later.
 hacking<0.11,>=0.10.0
 
-flake8<=2.4.1,>=2.2.4
-mock>=1.2
-nose
-coverage>=3.6
+flake8<=2.4.1,>=2.2.4 # MIT
+mock>=1.2 # BSD
+nose # LGPL
+coverage>=3.6 # Apache-2.0
 #discover
 #python-subunit>=0.0.18
-sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
+sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2 # BSD