diff --git a/requirements.txt b/requirements.txt
index 206466c2f..5df31963e 100755
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 falcon==0.2.0
 gunicorn>=19.1.0
 keystonemiddleware
-oslo.config>=1.2.1
+oslo.config>=1.2.1,<=2.6.0
 oslo.middleware
 oslo.log
 oslo.serialization