diff --git a/requirements.txt b/requirements.txt
index 389416df41..e76845b3d0 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,7 +6,7 @@
 pbr>=1.6 # Apache-2.0
 
 alembic>=0.8.4 # MIT
-Babel!=2.3.0,!=2.3.1,!=2.3.2,!=2.3.3,>=1.3 # BSD
+Babel>=2.3.4 # BSD
 eventlet!=0.18.3,>=0.18.2 # MIT
 greenlet>=0.3.2 # MIT
 lxml>=2.3 # BSD