diff --git a/composer.json b/composer.json
index 62639269..b73b4d6e 100644
--- a/composer.json
+++ b/composer.json
@@ -6,7 +6,8 @@
 	"require": {
 		"php": ">=5.4.0",
 		"symfony/http-foundation": "~2.4",
-		"league/event": "1.0.*"
+		"league/event": "~2.1",
+		"league/container": "~1.0"
 	},
 	"require-dev": {
 		"phpunit/phpunit": "4.3.*",