diff --git a/requirements.txt b/requirements.txt
index 76a0ba1f9..ac0fb31d3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,4 +11,4 @@ PrettyTable<0.8,>=0.7.1 # BSD
 requests!=2.12.2,!=2.13.0,>=2.10.0 # Apache-2.0
 simplejson>=2.2.0 # MIT
 six>=1.9.0 # MIT
-Babel>=2.3.4 # BSD
+Babel!=2.4.0,>=2.3.4 # BSD