diff --git a/composer.json b/composer.json
index 8a6d4c3..f1e6998 100644
--- a/composer.json
+++ b/composer.json
@@ -10,10 +10,7 @@
   ],
   "require": {
     "php-smpp/php-smpp": "1.2",
-    "illuminate/support": "^5.2"
-  },
-  "require-dev": {
-    "phpunit/phpunit": "~5.0"
+    "illuminate/support": "^5|^6|^7"
   },
   "autoload": {
     "psr-4": {
diff --git a/src/SmppService.php b/src/SmppService.php
index b57dabc..f0a3309 100644
--- a/src/SmppService.php
+++ b/src/SmppService.php
@@ -4,6 +4,7 @@
 
 use Exception;
 use Illuminate\Contracts\Config\Repository;
+use Illuminate\Support\Arr;
 use Log;
 use SMPP;
 use SmppAddress;
@@ -240,6 +241,6 @@ protected function getConfig($option)
         $key = $this->provider . '.' . $option;
         $default = $this->config->get(sprintf('laravel-smpp.defaults.%s', $option));
 
-        return array_get($this->providers, $key, $default);
+        return Arr::get($this->providers, $key, $default);
     }
 }
\ No newline at end of file