diff --git a/composer.json b/composer.json
index 0ebcabe..2e8df93 100644
--- a/composer.json
+++ b/composer.json
@@ -35,7 +35,7 @@
         "httpwg/structured-field-tests": "*@dev",
         "paragonie/constant_time_encoding": "^3.0.0",
         "phpcompatibility/php-compatibility": "^10@dev",
-        "phpmd/phpmd": "^2.15",
+        "phpmd/phpmd": "^2.15 || ^3.0",
         "phpstan/phpstan": "^2.1",
         "phpstan/phpstan-phpunit": "^2.0",
         "phpunit/phpunit": "^10.5",