Update README.md

Author: imrealashu

README.md

@@ -8,8 +8,8 @@ Two Factor Authentication is an extra security layer for your application. Two F
 
 This package lets you setup your two factor authentication for your existing laravel applicaiton within a minute.
 ## Requirements
-  - PHP 7.0 or Up
-  - Laravel 5 or Up
+  - PHP >= 7.0
+  - Laravel >= 5.3
   - Google Authenticator [Android](https://play.google.com/store/apps/details?id=com.google.android.apps.authenticator2&hl=en) - [iOS](https://itunes.apple.com/in/app/google-authenticator/id388497605?mt=8) or [Authy](https://www.authy.com/) mobile app
 
 ## Installation