diff --git a/doc/source/index.rst b/doc/source/index.rst
index 2a3b15d..282f019 100644
--- a/doc/source/index.rst
+++ b/doc/source/index.rst
@@ -4,7 +4,7 @@
    contain the root `toctree` directive.
 
 Welcome to brick-python-cinderclient-ext's documentation!
-========================================================
+=========================================================
 
 Contents:
 
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 53ee17f..7f427a4 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -6,8 +6,8 @@ cffi==1.11.5
 chardet==3.0.4
 cliff==2.11.0
 cmd2==0.8.1
-coverage==4.5.1
-ddt==1.1.2
+coverage==4.0
+ddt==1.0.1
 debtcollector==1.19.0
 docutils==0.14
 dulwich==0.19.0
@@ -35,7 +35,7 @@ msgpack==0.5.6
 netaddr==0.7.19
 netifaces==0.10.6
 openstackdocstheme==1.20.0
-os-brick==2.3.0
+os-brick==2.5.0
 os-client-config==1.29.0
 os-testr==1.0.0
 os-win==4.0.0
@@ -48,10 +48,10 @@ oslo.privsep==1.28.0
 oslo.serialization==2.25.0
 oslo.service==1.30.0
 oslo.utils==3.36.0
-oslotest==3.3.0
+oslotest==3.2.0
 Paste==2.0.3
 PasteDeploy==1.5.2
-pbr==3.1.1
+pbr==2.0.0
 pep8==1.5.7
 prettytable==0.7.2
 pycparser==2.18
@@ -60,7 +60,7 @@ Pygments==2.2.0
 pyinotify==0.9.6
 pyparsing==2.2.0
 pyperclip==1.6.0
-python-cinderclient==3.5.0
+python-cinderclient==3.3.0
 python-dateutil==2.7.0
 python-mimeparse==1.6.0
 python-subunit==1.2.0
@@ -78,11 +78,11 @@ six==1.11.0
 snowballstemmer==1.2.1
 Sphinx==1.6.5
 sphinxcontrib-websupport==1.0.1
-stestr==2.0.0
+stestr==1.0.0
 stevedore==1.28.0
-testrepository==0.0.20
-testscenarios==0.5.0
-testtools==2.3.0
+testrepository==0.0.18
+testscenarios==0.4
+testtools==2.2.0
 traceback2==1.4.0
 unittest2==1.1.0
 urllib3==1.22
diff --git a/requirements.txt b/requirements.txt
index 2475191..da15cfc 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -5,5 +5,5 @@
 pbr!=2.1.0,>=2.0.0 # Apache-2.0
 
 python-cinderclient>=3.3.0 # Apache-2.0
-os-brick>=2.2.0 # Apache-2.0
+os-brick>=2.5.0 # Apache-2.0
 oslo.concurrency>=3.26.0 # Apache-2.0