diff --git a/requirements.txt b/requirements.txt
index 5cf3d22..7a60967 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 # BSD
+Babel!=2.3.0,!=2.3.1,!=2.3.2,!=2.3.3,>=1.3 # BSD
 oslo.log>=1.14.0 # Apache-2.0
 oslo.i18n>=2.1.0 # Apache-2.0
 oslo.config>=3.7.0 # Apache-2.0