diff --git a/composer.json b/composer.json
index b98638c..629192f 100644
--- a/composer.json
+++ b/composer.json
@@ -9,10 +9,10 @@
         }
     ],
     "require": {
-        "php": "^7.2",
+        "php": "^7.2 || ^8.0",
 
-        "symfony/event-dispatcher": "^4.3|^5.0",
-        "symfony/event-dispatcher-contracts": "^1.1|^2.0"
+        "symfony/event-dispatcher": "^4.3 || ^5.0",
+        "symfony/event-dispatcher-contracts": "^1.1 || ^2.0"
     },
     "autoload": {
         "psr-4": { "SyliusLabs\\Polyfill\\Symfony\\EventDispatcher\\": "src/" }