diff --git a/database/migrations/2015_12_14_200624_add_contact_table.php b/database/migrations/2015_12_14_200624_add_contact_table.php
index aaf6438..0ba2fe9 100644
--- a/database/migrations/2015_12_14_200624_add_contact_table.php
+++ b/database/migrations/2015_12_14_200624_add_contact_table.php
@@ -14,10 +14,10 @@ class AddContactTable extends Migration
     public function up()
     {
         Schema::create('contact', function(Blueprint $table) {
-            $table->increments('id');
-            $table->string('name');
-            $table->string('email');
-            $table->text('message');
+            $table->bigIncrements('id');
+            $table->string('name')->nullable();
+            $table->string('email')->nullable();
+            $table->text('message')->nullable();
             $table->timestamps();
         });
     }
diff --git a/database/migrations/2015_12_17_232249_add_subscription_table.php b/database/migrations/2015_12_17_232249_add_subscription_table.php
index 7e901d0..381da9b 100644
--- a/database/migrations/2015_12_17_232249_add_subscription_table.php
+++ b/database/migrations/2015_12_17_232249_add_subscription_table.php
@@ -14,9 +14,9 @@ class AddSubscriptionTable extends Migration
     public function up()
     {
         Schema::create('subscriptions', function(Blueprint $table) {
-            $table->increments('id');
-            $table->string('name');
-            $table->string('email');
+            $table->bigIncrements('id');
+            $table->string('name')->nullable();
+            $table->string('email')->nullable();
             $table->timestamps();
         });
     }
diff --git a/database/migrations/2018_04_17_222542_add_blog_table.php b/database/migrations/2018_04_17_222542_add_blog_table.php
index 67dab4c..8473522 100644
--- a/database/migrations/2018_04_17_222542_add_blog_table.php
+++ b/database/migrations/2018_04_17_222542_add_blog_table.php
@@ -14,7 +14,7 @@ class AddBlogTable extends Migration
     public function up()
     {
         Schema::create('blog', function(Blueprint $table) {
-            $table->increments('id');
+            $table->bigIncrements('id');
             $table->bigInteger('user_id')->unsigned();
             $table->foreign('user_id')->references('id')->on('users')->onDelete('cascade');
             $table->string('title')->nullable();