diff --git a/migrations/m140209_132017_init.php b/migrations/m140209_132017_init.php
index 82add0599..9a10a8621 100644
--- a/migrations/m140209_132017_init.php
+++ b/migrations/m140209_132017_init.php
@@ -10,7 +10,6 @@
  */
 
 use dektrium\user\migrations\Migration;
-use yii\db\Schema;
 
 /**
  * @author Dmitry Erofeev <dmeroff@gmail.com
@@ -20,23 +19,23 @@ class m140209_132017_init extends Migration
     public function up()
     {
         $this->createTable('{{%user}}', [
-            'id' => Schema::TYPE_PK,
-            'username'             => Schema::TYPE_STRING . '(25) NOT NULL',
-            'email'                => Schema::TYPE_STRING . '(255) NOT NULL',
-            'password_hash'        => Schema::TYPE_STRING . '(60) NOT NULL',
-            'auth_key'             => Schema::TYPE_STRING . '(32) NOT NULL',
-            'confirmation_token'   => Schema::TYPE_STRING . '(32) NULL',
-            'confirmation_sent_at' => Schema::TYPE_INTEGER. ' NULL',
-            'confirmed_at'         => Schema::TYPE_INTEGER. ' NULL',
-            'unconfirmed_email'    => Schema::TYPE_STRING . '(255) NULL',
-            'recovery_token'       => Schema::TYPE_STRING . '(32) NULL',
-            'recovery_sent_at'     => Schema::TYPE_INTEGER. ' NULL',
-            'blocked_at'           => Schema::TYPE_INTEGER. ' NULL',
-            'registered_from'      => Schema::TYPE_INTEGER. ' NULL',
-            'logged_in_from'       => Schema::TYPE_INTEGER. ' NULL',
-            'logged_in_at'         => Schema::TYPE_INTEGER. ' NULL',
-            'created_at'           => Schema::TYPE_INTEGER . ' NOT NULL',
-            'updated_at'           => Schema::TYPE_INTEGER . ' NOT NULL',
+            'id'                   => $this->primaryKey(),
+            'username'             => $this->string(25)->notNull(),
+            'email'                => $this->string(255)->notNull(),
+            'password_hash'        => $this->string(60)->notNull(),
+            'auth_key'             => $this->string(32)->notNull(),
+            'confirmation_token'   => $this->string(32)->null(),
+            'confirmation_sent_at' => $this->integer()->null(),
+            'confirmed_at'         => $this->integer()->null(),
+            'unconfirmed_email'    => $this->string(255)->null(),
+            'recovery_token'       => $this->string(32)->null(),
+            'recovery_sent_at'     => $this->integer()->null(),
+            'blocked_at'           => $this->integer()->null(),
+            'registered_from'      => $this->integer()->null(),
+            'logged_in_from'       => $this->integer()->null(),
+            'logged_in_at'         => $this->integer()->null(),
+            'created_at'           => $this->integer()->notNull(),
+            'updated_at'           => $this->integer()->notNull(),
         ], $this->tableOptions);
 
         $this->createIndex('{{%user_unique_username}}', '{{%user}}', 'username', true);
@@ -45,14 +44,14 @@ public function up()
         $this->createIndex('{{%user_recovery}}', '{{%user}}', 'id, recovery_token', true);
 
         $this->createTable('{{%profile}}', [
-            'user_id'        => Schema::TYPE_INTEGER . ' PRIMARY KEY',
-            'name'           => Schema::TYPE_STRING . '(255) NULL',
-            'public_email'   => Schema::TYPE_STRING . '(255) NULL',
-            'gravatar_email' => Schema::TYPE_STRING . '(255) NULL',
-            'gravatar_id'    => Schema::TYPE_STRING . '(32) NULL',
-            'location'       => Schema::TYPE_STRING . '(255) NULL',
-            'website'        => Schema::TYPE_STRING . '(255) NULL',
-            'bio'            => Schema::TYPE_TEXT. ' NULL',
+            'user_id'        => $this->primaryKey(),
+            'name'           => $this->string(255)->null(),
+            'public_email'   => $this->string(255)->null(),
+            'gravatar_email' => $this->string(255)->null(),
+            'gravatar_id'    => $this->string(32)->null(),
+            'location'       => $this->string(255)->null(),
+            'website'        => $this->string(255)->null(),
+            'bio'            => $this->text()->null(),
         ], $this->tableOptions);
 
         $this->addForeignKey('{{%fk_user_profile}}', '{{%profile}}', 'user_id', '{{%user}}', 'id', $this->cascade, $this->restrict);
diff --git a/migrations/m140403_174025_create_account_table.php b/migrations/m140403_174025_create_account_table.php
index cdc6130c6..d894be023 100644
--- a/migrations/m140403_174025_create_account_table.php
+++ b/migrations/m140403_174025_create_account_table.php
@@ -10,7 +10,6 @@
  */
 
 use dektrium\user\migrations\Migration;
-use yii\db\Schema;
 
 /**
  * @author Dmitry Erofeev <dmeroff@gmail.com
@@ -20,11 +19,11 @@ class m140403_174025_create_account_table extends Migration
     public function up()
     {
         $this->createTable('{{%account}}', [
-            'id'         => Schema::TYPE_PK,
-            'user_id'    => Schema::TYPE_INTEGER. ' NULL',
-            'provider'   => Schema::TYPE_STRING . ' NOT NULL',
-            'client_id'  => Schema::TYPE_STRING . ' NOT NULL',
-            'properties' => Schema::TYPE_TEXT . ' NULL',
+            'id'         => $this->primaryKey(),
+            'user_id'    => $this->integer()->null(),
+            'provider'   => $this->string()->notNull(),
+            'client_id'  => $this->string()->notNull(),
+            'properties' => $this->text()->null(),
         ], $this->tableOptions);
 
         $this->createIndex('{{%account_unique}}', '{{%account}}', ['provider', 'client_id'], true);
diff --git a/migrations/m140504_113157_update_tables.php b/migrations/m140504_113157_update_tables.php
index b93a346ba..89c05cfa7 100644
--- a/migrations/m140504_113157_update_tables.php
+++ b/migrations/m140504_113157_update_tables.php
@@ -10,7 +10,6 @@
  */
 
 use dektrium\user\migrations\Migration;
-use yii\db\Schema;
 
 /**
  * @author Dmitry Erofeev <dmeroff@gmail.com>
@@ -29,7 +28,7 @@ public function up()
         $this->dropColumn('{{%user}}', 'logged_in_from');
         $this->dropColumn('{{%user}}', 'logged_in_at');
         $this->renameColumn('{{%user}}', 'registered_from', 'registration_ip');
-        $this->addColumn('{{%user}}', 'flags', Schema::TYPE_INTEGER . ' NOT NULL DEFAULT 0');
+        $this->addColumn('{{%user}}', 'flags', $this->integer()->notNull()->defaultValue(0));
 
         // account table
         $this->renameColumn('{{%account}}', 'properties', 'data');
@@ -43,16 +42,16 @@ public function down()
         // user table
         if ($this->dbType == 'sqlsrv') {
             // this is needed because we need to drop the default constraint first
-            $this->dropColumnConstraints('{{%user}}','flags');
+            $this->dropColumnConstraints('{{%user}}', 'flags');
         }
         $this->dropColumn('{{%user}}', 'flags');
         $this->renameColumn('{{%user}}', 'registration_ip', 'registered_from');
-        $this->addColumn('{{%user}}', 'logged_in_at', Schema::TYPE_INTEGER);
-        $this->addColumn('{{%user}}', 'logged_in_from', Schema::TYPE_INTEGER);
-        $this->addColumn('{{%user}}', 'recovery_sent_at', Schema::TYPE_INTEGER);
-        $this->addColumn('{{%user}}', 'recovery_token', Schema::TYPE_STRING . '(32)');
-        $this->addColumn('{{%user}}', 'confirmation_sent_at', Schema::TYPE_INTEGER);
-        $this->addColumn('{{%user}}', 'confirmation_token', Schema::TYPE_STRING . '(32)');
+        $this->addColumn('{{%user}}', 'logged_in_at', $this->integer());
+        $this->addColumn('{{%user}}', 'logged_in_from', $this->integer());
+        $this->addColumn('{{%user}}', 'recovery_sent_at', $this->integer());
+        $this->addColumn('{{%user}}', 'recovery_token', $this->string(32));
+        $this->addColumn('{{%user}}', 'confirmation_sent_at', $this->integer());
+        $this->addColumn('{{%user}}', 'confirmation_token', $this->string(32));
         $this->createIndex('{{%user_confirmation}}', '{{%user}}', 'id, confirmation_token', true);
         $this->createIndex('{{%user_recovery}', '{{%user}}', 'id, recovery_token', true);
     }
diff --git a/migrations/m140504_130429_create_token_table.php b/migrations/m140504_130429_create_token_table.php
index 65badd472..fc3f23eaa 100644
--- a/migrations/m140504_130429_create_token_table.php
+++ b/migrations/m140504_130429_create_token_table.php
@@ -10,7 +10,6 @@
  */
 
 use dektrium\user\migrations\Migration;
-use yii\db\Schema;
 
 /**
  * @author Dmitry Erofeev <dmeroff@gmail.com>
@@ -20,10 +19,10 @@ class m140504_130429_create_token_table extends Migration
     public function up()
     {
         $this->createTable('{{%token}}', [
-            'user_id' => Schema::TYPE_INTEGER . ' NOT NULL',
-            'code' => Schema::TYPE_STRING . '(32) NOT NULL',
-            'created_at' => Schema::TYPE_INTEGER . ' NOT NULL',
-            'type' => Schema::TYPE_SMALLINT . ' NOT NULL',
+            'user_id'    => $this->integer()->notNull(),
+            'code'       => $this->string(32)->notNull(),
+            'created_at' => $this->integer()->notNull(),
+            'type'       => $this->smallInteger()->notNull(),
         ], $this->tableOptions);
 
         $this->createIndex('{{%token_unique}}', '{{%token}}', ['user_id', 'code', 'type'], true);
diff --git a/migrations/m140830_171933_fix_ip_field.php b/migrations/m140830_171933_fix_ip_field.php
index 3ff71ae4c..a67884e90 100644
--- a/migrations/m140830_171933_fix_ip_field.php
+++ b/migrations/m140830_171933_fix_ip_field.php
@@ -10,7 +10,6 @@
  */
 
 use dektrium\user\migrations\Migration;
-use yii\db\Schema;
 
 /**
  * @author Dmitry Erofeev <dmeroff@gmail.com>
@@ -19,11 +18,11 @@ class m140830_171933_fix_ip_field extends Migration
 {
     public function up()
     {
-        $this->alterColumn('{{%user}}', 'registration_ip', Schema::TYPE_BIGINT. ' NULL');
+        $this->alterColumn('{{%user}}', 'registration_ip', $this->bigInteger()->null());
     }
 
     public function down()
     {
-        $this->alterColumn('{{%user}}', 'registration_ip', Schema::TYPE_INTEGER. ' NULL');
+        $this->alterColumn('{{%user}}', 'registration_ip', $this->integer()->null());
     }
 }
diff --git a/migrations/m141222_110026_update_ip_field.php b/migrations/m141222_110026_update_ip_field.php
index 3a8003589..9ea0c47d1 100644
--- a/migrations/m141222_110026_update_ip_field.php
+++ b/migrations/m141222_110026_update_ip_field.php
@@ -11,7 +11,6 @@
 
 use dektrium\user\migrations\Migration;
 use yii\db\Query;
-use yii\db\Schema;
 
 class m141222_110026_update_ip_field extends Migration
 {
@@ -21,7 +20,7 @@ public function up()
 
         $transaction = Yii::$app->db->beginTransaction();
         try {
-            $this->alterColumn('{{%user}}', 'registration_ip', Schema::TYPE_STRING . '(45) NULL');
+            $this->alterColumn('{{%user}}', 'registration_ip', $this->string(45)->null());
             foreach ($users as $user) {
                 if ($user['ip'] == null) {
                     continue;
@@ -44,16 +43,17 @@ public function down()
         $transaction = Yii::$app->db->beginTransaction();
         try {
             foreach ($users as $user) {
-                if ($user['ip'] == null)
+                if ($user['ip'] == null) {
                     continue;
+                }
                 Yii::$app->db->createCommand()->update('{{%user}}', [
                     'registration_ip' => ip2long($user['ip'])
                 ], 'id = ' . $user['id'])->execute();
             }
             if ($this->dbType == 'pgsql') {
-                $this->alterColumn('{{%user}}', 'registration_ip', Schema::TYPE_BIGINT . ' USING registration_ip::bigint');
+                $this->alterColumn('{{%user}}', 'registration_ip', $this->bigInteger() . ' USING registration_ip::bigint');
             } else {
-                $this->alterColumn('{{%user}}', 'registration_ip', Schema::TYPE_BIGINT. ' NULL');
+                $this->alterColumn('{{%user}}', 'registration_ip', $this->bigInteger()->null());
             }
 
             $transaction->commit();
diff --git a/migrations/m141222_135246_alter_username_length.php b/migrations/m141222_135246_alter_username_length.php
index 8cb1885e6..90e8acce0 100644
--- a/migrations/m141222_135246_alter_username_length.php
+++ b/migrations/m141222_135246_alter_username_length.php
@@ -10,16 +10,15 @@
  */
 
 use dektrium\user\migrations\Migration;
-use yii\db\Schema;
 
 class m141222_135246_alter_username_length extends Migration
 {
     public function up()
     {
         if ($this->dbType == 'sqlsrv') {
-            $this->dropIndex('{{%user_unique_username}}','{{%user}}');
-        }            
-        $this->alterColumn('{{%user}}', 'username', Schema::TYPE_STRING . '(255) NOT NULL');
+            $this->dropIndex('{{%user_unique_username}}', '{{%user}}');
+        }
+        $this->alterColumn('{{%user}}', 'username', $this->string(255)->notNull());
         if ($this->dbType == 'sqlsrv') {
             $this->createIndex('{{%user_unique_username}}', '{{%user}}', 'username', true);
         }
@@ -28,9 +27,9 @@ public function up()
     public function down()
     {
         if ($this->dbType == 'sqlsrv') {
-            $this->dropIndex('{{%user_unique_username}}','{{%user}}');
+            $this->dropIndex('{{%user_unique_username}}', '{{%user}}');
         }
-        $this->alterColumn('{{%user}}', 'username', Schema::TYPE_STRING . '(25) NOT NULL');
+        $this->alterColumn('{{%user}}', 'username', $this->string(25)->notNull());
         if ($this->dbType == 'sqlsrv') {
             $this->createIndex('{{%user_unique_username}}', '{{%user}}', 'username', true);
         }
diff --git a/migrations/m150614_103145_update_social_account_table.php b/migrations/m150614_103145_update_social_account_table.php
index a3725ac1c..82e0a0fa9 100644
--- a/migrations/m150614_103145_update_social_account_table.php
+++ b/migrations/m150614_103145_update_social_account_table.php
@@ -1,17 +1,16 @@
 <?php
 
 use yii\db\Query;
-use yii\db\Schema;
 use dektrium\user\migrations\Migration;
 
 class m150614_103145_update_social_account_table extends Migration
 {
     public function up()
     {
-        $this->addColumn('{{%social_account}}', 'code', Schema::TYPE_STRING . '(32) NULL');
-        $this->addColumn('{{%social_account}}', 'created_at', Schema::TYPE_INTEGER. ' NULL');
-        $this->addColumn('{{%social_account}}', 'email', Schema::TYPE_STRING. ' NULL');
-        $this->addColumn('{{%social_account}}', 'username', Schema::TYPE_STRING. ' NULL');
+        $this->addColumn('{{%social_account}}', 'code', $this->string(32)->null());
+        $this->addColumn('{{%social_account}}', 'created_at', $this->integer()->null());
+        $this->addColumn('{{%social_account}}', 'email', $this->string()->null());
+        $this->addColumn('{{%social_account}}', 'username', $this->string()->null());
         $this->createIndex('{{%account_unique_code}}', '{{%social_account}}', 'code', true);
 
         $accounts = (new Query())->from('{{%social_account}}')->select('id')->all();
diff --git a/migrations/m150623_212711_fix_username_notnull.php b/migrations/m150623_212711_fix_username_notnull.php
index 5f948387f..46afa50f1 100644
--- a/migrations/m150623_212711_fix_username_notnull.php
+++ b/migrations/m150623_212711_fix_username_notnull.php
@@ -10,7 +10,6 @@
  */
 
 use dektrium\user\migrations\Migration;
-use yii\db\Schema;
 
 class m150623_212711_fix_username_notnull extends Migration
 {
@@ -20,9 +19,9 @@ public function up()
             $this->alterColumn('{{%user}}', 'username', 'SET NOT NULL');
         } else {
             if ($this->dbType == 'sqlsrv') {
-                $this->dropIndex('{{%user_unique_username}}','{{%user}}');
+                $this->dropIndex('{{%user_unique_username}}', '{{%user}}');
             }
-            $this->alterColumn('{{%user}}', 'username', Schema::TYPE_STRING . '(255) NOT NULL');
+            $this->alterColumn('{{%user}}', 'username', $this->string(255)->notNull());
             if ($this->dbType == 'sqlsrv') {
                 $this->createIndex('{{%user_unique_username}}', '{{%user}}', 'username', true);
             }
@@ -31,13 +30,13 @@ public function up()
 
     public function down()
     {
-        if($this->dbType == "pgsql"){
+        if ($this->dbType == "pgsql") {
             $this->alterColumn('{{%user}}', 'username', 'DROP NOT NULL');
-        }else{
+        } else {
             if ($this->dbType == 'sqlsrv') {
-                $this->dropIndex('{{%user_unique_username}}','{{%user}}');
+                $this->dropIndex('{{%user_unique_username}}', '{{%user}}');
             }
-            $this->alterColumn('{{%user}}', 'username', Schema::TYPE_STRING . '(255) NULL');
+            $this->alterColumn('{{%user}}', 'username', $this->string(255)->null());
             if ($this->dbType == 'sqlsrv') {
                 $this->createIndex('{{%user_unique_username}}', '{{%user}}', 'username', true);
             }
diff --git a/migrations/m151218_234654_add_timezone_to_profile.php b/migrations/m151218_234654_add_timezone_to_profile.php
index 41c7ba3d1..a580b9426 100644
--- a/migrations/m151218_234654_add_timezone_to_profile.php
+++ b/migrations/m151218_234654_add_timezone_to_profile.php
@@ -9,19 +9,17 @@
  * file that was distributed with this source code.
  */
 
-use yii\db\Schema;
 use dektrium\user\migrations\Migration;
 
 class m151218_234654_add_timezone_to_profile extends Migration
 {
     public function up()
     {
-        $this->addColumn('{{%profile}}', 'timezone', Schema::TYPE_STRING . '(40) NULL');
+        $this->addColumn('{{%profile}}', 'timezone', $this->string(40)->null());
     }
 
     public function down()
     {
         $this->dropcolumn('{{%profile}}', 'timezone');
     }
-
 }