diff --git a/requirements.txt b/requirements.txt
index 80d42b3..7f76061 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,19 +5,19 @@
 pbr>=1.6
 
 ansible<2.0.0.0
-eventlet>=0.17.4
-keystonemiddleware>=2.0.0,!=2.4.0
+eventlet!=0.18.3,>=0.18.2 # MIT
+keystonemiddleware>=4.0.0,!=4.1.0,!=4.5.0 # Apache-2.0
 MySQL-python
-PyMySQL>=0.6.2  # MIT License
-oslo.config>=2.3.0  # Apache-2.0
-oslo.concurrency>=2.3.0         # Apache-2.0
-oslo.db>=2.4.1  # Apache-2.0
-oslo.messaging>=1.16.0,!=1.17.0,!=1.17.1,!=2.6.0,!=2.6.1,!=2.7.0,!=2.8.0,!=2.8.1,!=2.9.0,!=3.1.0 # Apache-2.0
-oslo.versionedobjects>=0.9.0
-paramiko>=1.13.0
-pecan>=1.0.0
-python-cinderclient>=1.3.1
-python-glanceclient>=0.18.0
-python-neutronclient>=2.6.0
-python-novaclient>=2.28.1,!=2.33.0
-WSME>=0.7
+PyMySQL>=0.6.2,!=0.7.7 # MIT License
+oslo.config>=3.14.0  # Apache-2.0
+oslo.concurrency>=3.8.0         # Apache-2.0
+oslo.db>=4.10.0,!=4.13.1,!=4.13.2 # Apache-2.0
+oslo.messaging>=5.2.0 # Apache-2.0
+oslo.versionedobjects>=1.13.0 # Apache-2.0
+paramiko>=2.0 # LGPLv2.1+
+pecan>=1.0.0,!=1.0.2,!=1.0.3,!=1.0.4 # BSD
+python-cinderclient>=1.6.0,!=1.7.0,!=1.7.1 # Apache-2.0
+python-glanceclient>=2.3.0,!=2.4.0 # Apache-2.0
+python-neutronclient>=5.1.0  # Apache-2.0
+python-novaclient>=2.29.0,!=2.33.0 # Apache-2.0
+WSME>=0.8 # MIT