diff --git a/lower-constraints.txt b/lower-constraints.txt
index d5c194f22..b5a0cb69f 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -39,7 +39,7 @@ openstackdocstheme==1.18.1
 os-api-ref==1.4.0
 os-client-config==1.28.0
 os-testr==1.0.0
-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
@@ -78,7 +78,7 @@ rfc3986==0.3.1
 Routes==2.3.1
 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