diff --git a/composer.json b/composer.json
index 05ac0037146..6e7f24b451e 100644
--- a/composer.json
+++ b/composer.json
@@ -13,8 +13,10 @@
   ],
   "require": {
     "php": ">=5.5.0",
-    "datto/protobuf-php": "dev-master",
-    "google/auth": "v0.7"
+    "datto/protobuf-php": "dev-master"
+  },
+  "require-dev": {
+    "google/auth": "v0.9"
   },
   "autoload": {
     "psr-4": {