diff --git a/composer.json b/composer.json
index 48d9d1f..442aff4 100644
--- a/composer.json
+++ b/composer.json
@@ -18,12 +18,12 @@
     ],
     "require": {
         "php": "^7.3|^8.0",
-        "illuminate/support": "^6.0|^7.0|^8.0",
+        "illuminate/support": "^8.0",
         "drewm/mailchimp-api": "^2.4"
     },
     "require-dev": {
-        "phpunit/phpunit": "^8.0|^9.0",
-        "mockery/mockery": "^1.3"
+        "phpunit/phpunit": "^9.5",
+        "mockery/mockery": "^1.4"
     },
     "autoload": {
         "psr-4": {