diff --git a/composer.json b/composer.json
index 45f1985ad9f04951392af042a100ba8741418348..882a38cf03c57a980786cfeed3fea600d8e7d07f 100644
--- a/composer.json
+++ b/composer.json
@@ -13,7 +13,7 @@
         "wpdesk/wp-plugin-flow-common": "^1"
     },
     "require-dev": {
-        "phpunit/phpunit": "<7",
+        "phpunit/phpunit": "^7||^8||^9",
         "wp-coding-standards/wpcs": "^0.14.1",
         "squizlabs/php_codesniffer": "^3.0.2",
         "mockery/mockery": "*",