Database max key length

Laravel database key length problem solve code here....
Problem: [PDOException] SQLSTATE[42000]: Syntax error or access violation: 1071 Specified key was too long; max key length is 767 byte
Web site solve link : https://stackoverflow.com/questions/42244541/laravel-migration-error-syntax-error-or-access-violation-1071-specified-key-wa
Add the following code to AppServiceProvider.php
File location: app/Providers/AppServiceProvider.php

use Illuminate\Support\Facades\Schema; //Import Schema
function boot()
{
    Schema::defaultStringLength(191); //Solved by increasing StringLength
}