diff --git a/composer.json b/composer.json
index f2266031..c3df36cd 100644
--- a/composer.json
+++ b/composer.json
@@ -39,6 +39,7 @@
 	},
 	"require-dev": {
 		"php": "^7 || ^8",
+		"brain/monkey": "^2.0",
 		"coenjacobs/mozart": "^0.7",
 		"dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
 		"deliciousbrains/wp-background-processing": "~1.0",