diff --git a/composer.json b/composer.json
index a06ef60..7d8c60f 100644
--- a/composer.json
+++ b/composer.json
@@ -19,13 +19,13 @@
 
     "require": {
         "php":                      ">=5.5.9",
-        "symfony/framework-bundle": "~2.8|~3.0|^4.0",
-        "symfony/dependency-injection": "~2.8|~3.0|^4.0",
+        "symfony/framework-bundle": "~2.8|~3.0|^4.0|^5.0",
+        "symfony/dependency-injection": "~2.8|~3.0|^4.0|^5.0",
         "michelf/php-markdown":     "~1.4"
     },
     "require-dev": {
         "phpunit/phpunit":          "~4.5",
-        "symfony/templating": "~2.8|~3.0|^4.0"
+        "symfony/templating": "~2.8|~3.0|^4.0|^5.0"
     },
     "suggest": {
         "symfony/twig-bundle": "to use the Twig markdown filter",