diff --git a/composer.json b/composer.json
index fe1d172..d30722a 100644
--- a/composer.json
+++ b/composer.json
@@ -28,7 +28,7 @@
         "szepeviktor/phpstan-wordpress": "<=1.3.2",
         "php-stubs/wordpress-stubs": "6.4.*",
         "roots/wordpress": "6.4.*",
-        "wp-phpunit/wp-phpunit": "6.4.*",
+        "wp-phpunit/wp-phpunit": "6.4.* || 6.5.*",
         "dealerdirect/phpcodesniffer-composer-installer": "<=1.0.0",
         "wp-coding-standards/wpcs": "<=2.3.0",
         "yoast/phpunit-polyfills": "^1.0.0 || ^2.0.0",