diff --git a/composer.json b/composer.json
index 7b03368..4d03844 100644
--- a/composer.json
+++ b/composer.json
@@ -11,9 +11,9 @@
     },
     "require": {
         "composer-plugin-api": "^1.0",
-        "symfony/console": "^2.7 || ^3.0",
-        "symfony/filesystem": "^2.5 || ^3.0",
-        "symfony/process": "^2.5 || ^3.0"
+        "symfony/console": "^2.7 || ^3.0 || ^4.0",
+        "symfony/filesystem": "^2.5 || ^3.0 || ^4.0",
+        "symfony/process": "^2.5 || ^3.0 || ^4.0"
     },
     "require-dev": {
         "composer/composer": "dev-master",