diff --git a/.gitignore b/.gitignore
index 4cbf6047c..948f2fc65 100644
--- a/.gitignore
+++ b/.gitignore
@@ -53,6 +53,7 @@ ChangeLog
 !/.pylintrc
 !/.testr.conf
 !/.stestr.conf
+.stestr
 
 contrib/vagrant/.vagrant
 
diff --git a/lower-constraints.txt b/lower-constraints.txt
index 8e25d5793..a16623304 100644
--- a/lower-constraints.txt
+++ b/lower-constraints.txt
@@ -5,7 +5,7 @@ appdirs==1.4.3
 Babel==2.5.3
 cachetools==2.0.1
 certifi==2018.1.18
-cffi==1.11.5
+cffi==1.14.0
 chardet==3.0.4
 click==6.7
 cliff==2.11.0
@@ -28,8 +28,8 @@ fixtures==3.0.0
 Flask==0.12.3
 future==0.16.0
 futurist==1.6.0
-greenlet==0.4.13
-grpcio==1.12.0
+greenlet==0.4.16
+grpcio==1.25.0
 idna==2.6
 imagesize==1.0.0
 iso8601==0.1.12
diff --git a/requirements.txt b/requirements.txt
index 5b171726a..131f1dd98 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -22,6 +22,6 @@ PrettyTable>=0.7.2  # BSD
 pyroute2>=0.5.7;sys_platform!='win32' # Apache-2.0 (+ dual licensed GPL2)
 retrying!=1.3.0,>=1.2.3 # Apache-2.0
 stevedore>=1.20.0 # Apache-2.0
-grpcio>=1.12.0 # Apache-2.0
+grpcio>=1.25.0 # Apache-2.0
 protobuf>=3.6.0 # 3-Clause BSD
 prometheus_client>=0.6.0 # Apache-2.0