diff --git a/composer.json b/composer.json
index 50df9b8..d6e803b 100644
--- a/composer.json
+++ b/composer.json
@@ -1,25 +1,31 @@
 {
-    "name": "malico/mobile-cm-php",
-    "description": "Get Telephone number's Mobile Network",
-    "license": "MIT",
-    "archive": {
-        "exclude": [
-            "tests"
-        ]
-    },
-    "authors": [
-        {
-            "name": "Malico",
-            "email": "hi@malico.me"
-        }
-    ],
-    "autoload": {
-        "psr-4": {
-            "Malico\\MobileCM\\": "src/"
-        }
-    },
-    "minimum-stability": "dev",
-    "require-dev": {
-        "pestphp/pest": "1.x-dev"
-    }
+	"name": "malico/mobile-cm-php",
+	"description": "Get Telephone number's Mobile Network",
+	"license": "MIT",
+	"archive": {
+		"exclude": [
+			"tests"
+		]
+	},
+	"authors": [
+		{
+			"name": "Malico",
+			"email": "hi@malico.me"
+		}
+	],
+	"scripts": {
+		"test": [
+			"php7.4 ./vendor/bin/pest",
+			"php8.0 ./vendor/bin/pest"
+		]
+	},
+	"autoload": {
+		"psr-4": {
+			"Malico\\MobileCM\\": "src/"
+		}
+	},
+	"minimum-stability": "dev",
+	"require-dev": {
+		"pestphp/pest": "1.x-dev"
+	}
 }
diff --git a/src/Network.php b/src/Network.php
index 6830568..5c4a8b3 100644
--- a/src/Network.php
+++ b/src/Network.php
@@ -41,7 +41,7 @@ class Network
      *
      * @return bool
      */
-    protected static function validLength($tel) : bool
+    protected static function validLength($tel): bool
     {
         $len = strlen($tel);
 
@@ -60,7 +60,7 @@ protected static function validLength($tel) : bool
      *
      * @return bool
      */
-    protected static function checkNumber(string | int $tel, $key)
+    protected static function checkNumber(string $tel, $key)
     {
         $tel = \str_replace(' ', '', (string) $tel);
 
@@ -81,11 +81,11 @@ protected static function checkNumber(string | int $tel, $key)
     /**
      * Check if Number is Orange.
      *
-     * @param string | int  $tel
+     * @param string   $tel
      *
      * @return  bool
      */
-    public static function isOrange(string | int $tel) : bool
+    public static function isOrange(string $tel): bool
     {
         return self::checkNumber($tel, 'orange');
     }
@@ -93,11 +93,11 @@ public static function isOrange(string | int $tel) : bool
     /**
      * Check if Number is MTN.
      *
-     * @param string | int  $tel
+     * @param string   $tel
      *
      * @return  bool
      */
-    public static function isMTN(string | int $tel) : bool
+    public static function isMTN(string $tel): bool
     {
         return self::checkNumber($tel, 'mtn');
     }
@@ -105,11 +105,11 @@ public static function isMTN(string | int $tel) : bool
     /**
      * Check if Number is Nexttel.
      *
-     * @param string | int  $tel
+     * @param string   $tel
      *
      * @return bool
      */
-    public static function isNexttel(string | int $tel) : bool
+    public static function isNexttel(string $tel): bool
     {
         return self::checkNumber($tel, 'nexttel');
     }
@@ -117,11 +117,11 @@ public static function isNexttel(string | int $tel) : bool
     /**
      * Check if Number is Camtel.
      *
-     * @param   string | int  $tel
+     * @param   string   $tel
      *
      * @return  bool
      */
-    public static function isCamtel(string | int $tel) : bool
+    public static function isCamtel(string $tel): bool
     {
         return self::checkNumber($tel, 'camtel');
     }
@@ -129,11 +129,11 @@ public static function isCamtel(string | int $tel) : bool
     /**
      * Match Number to Operator.
      *
-     * @param string | int  $tel
+     * @param string   $tel
      *
      * @return bool
      */
-    public static function check($tel) : string | null
+    public static function check($tel): string
     {
         foreach (self::OPERATOR_PREFIXES as $key => $value) {
             if (self::checkNumber($tel, $key)) {