diff --git a/composer.json b/composer.json
index 29a455c..f532f2c 100644
--- a/composer.json
+++ b/composer.json
@@ -13,9 +13,9 @@
     ],
     "require": {
         "php": "^5.4|^7.0",
-        "symfony/framework-bundle": "^2.6|^3.0",
-        "symfony/security-bundle": "^2.6|^3.0",
-        "symfony/monolog-bundle": "^2.2|^3.0",
+        "symfony/framework-bundle": "^2.6|^3.0|^4.0",
+        "symfony/security-bundle": "^2.6|^3.0|^4.0",
+        "symfony/monolog-bundle": "^2.2|^3.0|^4.0",
         "doctrine/doctrine-bundle": "^1.0",
         "doctrine/orm": "^2.2",
         "hautelook/phpass": "0.3"