diff --git a/requirements.txt b/requirements.txt
index 1b26122..cc682ca 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,7 +2,7 @@ coverage==4.5.1
 enum34==1.1.6
 futures==3.2.0; python_version < '3.0'
 googleapis-common-protos==1.5.3
-grpcio==1.8.4
+grpcio==1.16.0
 grpcio-tools==1.12.1
 nose==1.3.7
 protobuf==3.5.2