diff --git a/requirements.txt b/requirements.txt
index 07b636a5..f27c50f2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 deepdiff==3.3.0
 gitpython
-grpcio==1.16.0
+grpcio>=1.16.0
 jsonschema>=2.6.0
 keystoneauth1==2.21.0
 keystonemiddleware==4.9.1
diff --git a/test-requirements.txt b/test-requirements.txt
index 4c2d8cff..19bf54e8 100644
--- a/test-requirements.txt
+++ b/test-requirements.txt
@@ -1,4 +1,5 @@
 # General
+pyflakes>=2.1.1
 tox
 
 # Docs