diff --git a/composer.json b/composer.json
index 4272401..ff8d0d4 100644
--- a/composer.json
+++ b/composer.json
@@ -19,8 +19,8 @@
     "require": {
         "php": ">=5.3.9",
         "gregwar/captcha": "~1.1",
-        "symfony/framework-bundle": "~2.8|~3.0",
-        "symfony/form": "~2.8|~3.0"
+        "symfony/framework-bundle": "~2.8|~3.0|~4.0",
+        "symfony/form": "~2.8|~3.0|~4.0"
     },
     "autoload": {
         "psr-4": {