diff --git a/requirements.txt b/requirements.txt
index 5a30d63e..f1bf34c3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -6,5 +6,6 @@ Babel>=1.3
 dogpile.cache>=0.5.3
 six>=1.9.0
 oslo.config>=1.11.0 # Apache-2.0
+oslo.i18n>=1.5.0 # Apache-2.0
 oslo.log>=1.2.0 # Apache-2.0
 oslo.utils>=1.6.0 # Apache-2.0