diff --git a/composer.json b/composer.json
index f9de2fb..cdd7b6f 100644
--- a/composer.json
+++ b/composer.json
@@ -19,7 +19,7 @@
         "mockery/mockery": "^1.0",
         "nunomaduro/collision": "^3.0",
         "phpunit/php-invoker": "^2.0.0",
-        "phpunit/phpunit": "^8.4.1"
+        "phpunit/phpunit": "^7.4.1"
     },
     "config": {
         "optimize-autoloader": true,