diff --git a/requirements.txt b/requirements.txt
index e8de444e2..4ef766abf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -15,5 +15,5 @@ oslo.log>=3.22.0 # Apache-2.0
 semantic-version>=2.3.1 # BSD
 
 # message extraction
-Babel>=2.3.4 # BSD
+Babel!=2.4.0,>=2.3.4 # BSD
 django-babel>=0.5.1 # BSD