diff --git a/requirements.txt b/requirements.txt
index 6c2cefa6b..2b9881c00 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.
 
-Babel>=1.3
+Babel!=2.3.0,!=2.3.1,!=2.3.2,!=2.3.3,>=1.3 # BSD
 eventlet>=0.17.4
 Flask<1.0,>=0.10
 greenlet>=0.3.2
@@ -26,8 +26,8 @@ pbr>=1.6
 pecan>=1.0.0
 python-designateclient>=1.0.0
 python-neutronclient>=2.6.0
-Routes!=2.0,!=2.1,>=1.12.3;python_version=='2.7'
-Routes!=2.0,>=1.12.3;python_version!='2.7'
+Routes!=2.0,!=2.1,!=2.3.0,>=1.12.3;python_version=='2.7' # MIT
+Routes!=2.0,!=2.3.0,>=1.12.3;python_version!='2.7' # MIT
 requests!=2.8.0,!=2.9.0,>=2.5.2
 six>=1.9.0
 SQLAlchemy<1.1.0,>=0.9.9