diff --git a/requirements.txt b/requirements.txt
index dcd529a5..9d1fae23 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ argparse
 Babel>=1.3
 iso8601>=0.1.9
 lxml>=2.3
-oslo.config>=2.3.0 # Apache-2.0
+oslo.config>=2.6.0 # Apache-2.0
 sphinx!=1.2.0,!=1.3b1,<1.3,>=1.1.2
 demjson # GNU LGPL 3.0
 PyYAML>=3.1.0