diff --git a/composer.json b/composer.json
index 2e18e0a..bf3e4d2 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
   "require" : {
     "php" : ">=7.2",
     "thecodingmachine/graphqlite" : "^5.0",
-    "symfony/validator": "^4.2 | ^5",
+    "symfony/validator": "^4.2 | ^5 | ^6",
     "doctrine/annotations": "^1.6"
   },
   "require-dev": {