diff --git a/lower-constraints.txt b/lower-constraints.txt
index 12929bccd..d43377dc7 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -64,7 +64,7 @@ os-testr==1.0.0
 os-xenapi==0.3.1
 osc-lib==1.8.0
 oslo.cache==1.26.0
-oslo.concurrency==3.25.0
+oslo.concurrency==3.26.0
 oslo.config==5.2.0
 oslo.context==2.19.2
 oslo.db==4.27.0
@@ -119,7 +119,7 @@ PyYAML==3.12
 reno==2.5.0
 repoze.lru==0.7
 requests==2.14.2
-requests-mock==1.1.0
+requests-mock==1.2.0
 requestsexceptions==1.2.0
 rfc3986==0.3.1
 Routes==2.3.1
@@ -127,7 +127,7 @@ ryu==4.14
 simplejson==3.5.1
 six==1.10.0
 snowballstemmer==1.2.1
-Sphinx==1.6.5
+Sphinx==1.6.2
 sphinxcontrib-websupport==1.0.1
 SQLAlchemy==1.0.10
 sqlalchemy-migrate==0.11.0