diff --git a/src/Symfony/Component/Notifier/Bridge/Mercure/composer.json b/src/Symfony/Component/Notifier/Bridge/Mercure/composer.json
index 54137dd9d3cc3..ed13323a28166 100644
--- a/src/Symfony/Component/Notifier/Bridge/Mercure/composer.json
+++ b/src/Symfony/Component/Notifier/Bridge/Mercure/composer.json
@@ -18,7 +18,7 @@
     "require": {
         "php": ">=7.2.5",
         "ext-json": "*",
-        "symfony/mercure": "^0.5.2",
+        "symfony/mercure": "^0.5.2|^0.6",
         "symfony/notifier": "^5.3|^6.0",
         "symfony/service-contracts": "^1.10|^2|^3"
     },