diff --git a/requirements.txt b/requirements.txt
index 14892524..b4f81d35 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 gitpython==2.1.5
 grpc==0.3.post19
-grpcio==1.4.0
-grpcio-tools==1.4.0
+grpcio==1.6.0rc1
+grpcio-tools==1.6.0rc1
 keystoneauth1==2.21.0
 kubernetes>=1.0.0
 oslo.log==3.28.0