diff --git a/requirements.txt b/requirements.txt
index db619da53..5a9ee83e8 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,15 +3,15 @@
 # process, which may cause wedges in the gate later.
 pbr>=1.6 # Apache-2.0
 
-Babel>=1.3 # BSD
+Babel>=2.3.4 # BSD
 falcon>=0.1.6 # Apache-2.0
 jsonschema!=2.5.0,<3.0.0,>=2.0.0 # MIT
-iso8601>=0.1.9 # MIT
+iso8601>=0.1.11 # MIT
 keystonemiddleware!=4.1.0,>=4.0.0 # Apache-2.0
 msgpack-python>=0.4.0 # Apache-2.0
 python-memcached>=1.56 # PSF
 WebOb>=1.2.3 # MIT
-stevedore>=1.5.0 # Apache-2.0
+stevedore>=1.9.0 # Apache-2.0
 six>=1.9.0 # MIT
 oslo.cache>=1.5.0 # Apache-2.0
 oslo.config>=3.9.0 # Apache-2.0