diff --git a/requirements.txt b/requirements.txt
index a060f500d..9d61ac5bf 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -3,7 +3,7 @@
 # process, which may cause wedges in the gate later.
 
 # See: https://bugs.launchpad.net/pbr/+bug/1384919 for why this is here...
-pbr>=2.0.0 # Apache-2.0
+pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
 # Packages needed for using this library.
 
diff --git a/setup.cfg b/setup.cfg
index ebd3520fd..30b02bcb6 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -63,14 +63,14 @@ zookeeper =
 redis =
   redis>=2.10.0 # MIT
 workers =
-  kombu>=3.0.25 # BSD
+  kombu!=4.0.2,>=4.0.0 # BSD
 eventlet =
   eventlet!=0.18.3,>=0.18.2 # MIT
 doc =
   sphinx>=1.5.1 # BSD
   oslosphinx>=4.7.0 # Apache-2.0
 database =
-  SQLAlchemy<1.1.0,>=1.0.10 # MIT
+  SQLAlchemy!=1.1.5,!=1.1.6,!=1.1.7,!=1.1.8,>=1.0.10 # MIT
   alembic>=0.8.10 # MIT
   SQLAlchemy-Utils # BSD License
   PyMySQL>=0.7.6 # MIT License