<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateSettingsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('settings', function (Blueprint $table) {
            $table->increments('id');
            $table->string('setting')->comment("Key");
            $table->string('value',4000)->nullable()->comment("Value");
            $table->boolean('more')->default(NULL);
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('settings');
    }
}

<?php

use Illuminate\Support\Facades\Schema;
use Illuminate\Database\Schema\Blueprint;
use Illuminate\Database\Migrations\Migration;

class CreateSettingsTable extends Migration
{
    /**
     * Run the migrations.
     *
     * @return void
     */
    public function up()
    {
        Schema::create('settings', function (Blueprint $table) {
            $table->increments('id');
            $table->string('setting');
            $table->string('value')->nullable();
            $table->boolean('more')->default(NULL);
        });
    }

    /**
     * Reverse the migrations.
     *
     * @return void
     */
    public function down()
    {
        Schema::drop('settings');
    }
}

--- 
+++ 
@@ -15,8 +15,8 @@
     {
         Schema::create('settings', function (Blueprint $table) {
             $table->increments('id');
-            $table->string('setting');
-            $table->string('value')->nullable();
+            $table->string('setting')->comment("Key");
+            $table->string('value',4000)->nullable()->comment("Value");
             $table->boolean('more')->default(NULL);
         });
     }
Increase value column length in settings to 4000
