diff --git a/composer.json b/composer.json
index e5f1d9b..8d2053c 100755
--- a/composer.json
+++ b/composer.json
@@ -37,7 +37,10 @@
 		"doctrine/dbal": "2.3.4",
 		"swiftmailer/swiftmailer": "5.1.0",
         "twilio/sdk": "^5.16"
-    },
+	},
+	"require-dev": {
+		"heroku/heroku-buildpack-php": "*"
+	},
 	"config": {
 		"vendor-dir": "includes/vendor"
 	}