diff --git a/requirements.txt b/requirements.txt
index 1b26122..2c55f16 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 coverage==4.5.1
 enum34==1.1.6
 futures==3.2.0; python_version < '3.0'
-googleapis-common-protos==1.5.3
+googleapis-common-protos==1.51.0
 grpcio==1.8.4
 grpcio-tools==1.12.1
 nose==1.3.7