diff --git a/requirements.txt b/requirements.txt
index ca307e1f..170487cd 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,18 +5,18 @@
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
 stevedore>=1.20.0 # Apache-2.0
-netaddr!=0.7.16,>=0.7.13 # BSD
+netaddr>=0.7.18 # BSD
 six>=1.9.0 # MIT
 
-oslo.i18n!=3.15.2,>=2.1.0 # Apache-2.0
-oslo.utils>=3.20.0 # Apache-2.0
+oslo.i18n>=3.15.3 # Apache-2.0
+oslo.utils>=3.28.0 # Apache-2.0
 
 # for the routing notifier
 PyYAML>=3.10 # MIT
 
-lxml!=3.7.0,>=2.3 # BSD
+lxml!=3.7.0,>=3.4.1 # BSD
 suds-jurko>=0.6 # LGPLv3+
 eventlet!=0.18.3,!=0.20.1,<0.21.0,>=0.18.2 # MIT
 requests>=2.14.2 # Apache-2.0
 urllib3>=1.21.1 # MIT
-oslo.concurrency>=3.8.0 # Apache-2.0
+oslo.concurrency>=3.20.0 # Apache-2.0