diff --git a/composer.json b/composer.json
index e00e31f..6b9f826 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
         "szepeviktor/phpstan-wordpress": "*",
         "php-stubs/wordpress-stubs": "6.6.*",
         "roots/wordpress": "6.6.*",
-        "wp-phpunit/wp-phpunit": "6.6.*",
+        "wp-phpunit/wp-phpunit": "6.6.* || 6.9.*",
         "squizlabs/php_codesniffer": "3.*",
         "dealerdirect/phpcodesniffer-composer-installer": "*",
         "wp-coding-standards/wpcs": "^3",