diff --git a/requirements.txt b/requirements.txt
index 831ad686..0f3464b4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -25,7 +25,7 @@ pycadf!=2.0.0,>=1.1.0 # Apache-2.0
 pycrypto>=2.6 # Public Domain
 pyOpenSSL>=0.14 # Apache-2.0
 ldap3>=1.0.2 # LGPLv3
-keystonemiddleware!=4.5.0,>=4.2.0 # Apache-2.0
+keystonemiddleware>=4.12.0 # Apache-2.0
 six>=1.9.0 # MIT
 SQLAlchemy<1.1.0,>=1.0.10 # MIT
 stevedore>=1.17.1 # Apache-2.0