diff --git a/composer.json b/composer.json
index debe160..7205777 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
     },
     "require-dev": {
         "phpbench/phpbench": "^1.2",
-        "psalm/phar": "^5.9"
+        "psalm/phar": "^5.9 || ^6.0"
     },
     "license": "MIT",
     "autoload": {