diff --git a/composer.json b/composer.json
index b70c022..cddf286 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
     ],
     "require": {
         "php": ">=5.3.9",
-        "symfony/framework-bundle": "~2.8|~3.0"
+        "symfony/framework-bundle": "~2.8|~3.0|~4.0"
     },
     "require-dev": {
         "atoum/atoum": "dev-master"
@@ -25,4 +25,4 @@
         "psr-4": { "Swm\\Bundle\\MailHookBundle\\": "" },
         "exclude-from-classmap": ["/tests/"]
     }
-}
\ No newline at end of file
+}