diff --git a/vision/setup.py b/vision/setup.py
index 7a17741449407..6860e23fbaec3 100644
--- a/vision/setup.py
+++ b/vision/setup.py
@@ -26,6 +26,8 @@
 
 REQUIREMENTS = [
     'google-cloud-core >= 0.24.0, < 0.25dev',
+    'google-gax >= 0.15.7, < 0.16dev',
+    'googleapis-common-protos[grpc] >= 1.5.2, < 2.0dev',
 ]
 EXTRAS_REQUIRE = {
     ':python_version<"3.4"': ['enum34'],