diff --git a/composer.json b/composer.json
index 9aa7a05c..c57c1e93 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,8 @@
 	"homepage": "https://github.com/lncd/OAuth2",
 	"license": "MIT",
 	"require": {
-		"php": ">=5.3.0"
+		"php": ">=5.3.0",
+		"zetacomponents/database": "dev-master"
 	},
 	"require-dev": {
 		"mockery/mockery": ">=0.7.2"