diff --git a/Setup/InstallSchema.php b/Setup/InstallSchema.php
deleted file mode 100755
index af4e2ea..0000000
--- a/Setup/InstallSchema.php
+++ /dev/null
@@ -1,86 +0,0 @@
-<?php
-/**
- * Copyright © 2015 Ihor Vansach (ihor@magefan.com). All rights reserved.
- * Please visit Magefan.com for license details (https://magefan.com/end-user-license-agreement).
- *
- * Glory to Ukraine! Glory to the heroes!
- */
-
-namespace Magefan\LoginAsCustomer\Setup;
-
-use Magento\Framework\Setup\InstallSchemaInterface;
-use Magento\Framework\Setup\ModuleContextInterface;
-use Magento\Framework\Setup\SchemaSetupInterface;
-use Magento\Framework\DB\Adapter\AdapterInterface;
-
-/**
- * Login as customer setup
- */
-class InstallSchema implements InstallSchemaInterface
-{
-    /**
-     * {@inheritdoc}
-     * @SuppressWarnings(PHPMD.ExcessiveMethodLength)
-     */
-    public function install(SchemaSetupInterface $setup, ModuleContextInterface $context)
-    {
-        $installer = $setup;
-
-        $installer->startSetup();
-
-        /**
-         * Create table 'magefan_login_as_customer'
-         */
-        $table = $installer->getConnection()->newTable(
-            $installer->getTable('magefan_login_as_customer')
-        )->addColumn(
-            'login_id',
-            \Magento\Framework\DB\Ddl\Table::TYPE_INTEGER,
-            null,
-            ['identity' => true, 'nullable' => false, 'primary' => true],
-            'Admin Login ID'
-        )->addColumn(
-            'customer_id',
-            \Magento\Framework\DB\Ddl\Table::TYPE_INTEGER,
-            null,
-            ['nullable' => true],
-            'Customer ID'
-        )->addColumn(
-            'admin_id',
-            \Magento\Framework\DB\Ddl\Table::TYPE_INTEGER,
-            null,
-            ['nullable' => true],
-            'Admin ID'
-        )->addColumn(
-            'secret',
-            \Magento\Framework\DB\Ddl\Table::TYPE_TEXT,
-            '64',
-            ['nullable' => true],
-            'Login Secret'
-        )->addColumn(
-            'used',
-            \Magento\Framework\DB\Ddl\Table::TYPE_SMALLINT,
-            null,
-            ['nullable' => false, 'default' => '1'],
-            'Is Login Used'
-        )->addColumn(
-            'created_at',
-            \Magento\Framework\DB\Ddl\Table::TYPE_TIMESTAMP,
-            null,
-            [],
-            'Creation Time'
-        )->addIndex(
-            $installer->getIdxName('magefan_login_as_customer', ['customer_id']),
-            ['customer_id']
-        )
-        ->addIndex(
-            $installer->getIdxName('magefan_login_as_customer', ['admin_id']),
-            ['admin_id']
-        )->setComment(
-            'Magefan Login As Customer Table'
-        );
-        $installer->getConnection()->createTable($table);
-
-        $installer->endSetup();
-    }
-}
diff --git a/etc/db_schema.xml b/etc/db_schema.xml
new file mode 100644
index 0000000..80db86b
--- /dev/null
+++ b/etc/db_schema.xml
@@ -0,0 +1,20 @@
+<?xml version="1.0"?>
+<schema xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:noNamespaceSchemaLocation="urn:magento:framework:Setup/Declaration/Schema/etc/schema.xsd">
+  <table name="magefan_login_as_customer" resource="default" engine="innodb" comment="Magefan Login As Customer Table">
+    <column xsi:type="int" name="login_id" padding="11" unsigned="false" nullable="false" identity="true" comment="Admin Login ID"/>
+    <column xsi:type="int" name="customer_id" padding="11" unsigned="false" nullable="true" identity="false" comment="Customer ID"/>
+    <column xsi:type="int" name="admin_id" padding="11" unsigned="false" nullable="true" identity="false" comment="Admin ID"/>
+    <column xsi:type="varchar" name="secret" nullable="true" length="64" comment="Login Secret"/>
+    <column xsi:type="smallint" name="used" padding="6" unsigned="false" nullable="false" identity="false" default="1" comment="Is Login Used"/>
+    <column xsi:type="timestamp" name="created_at" on_update="false" nullable="true" comment="Creation Time"/>
+    <constraint xsi:type="primary" referenceId="PRIMARY">
+      <column name="login_id"/>
+    </constraint>
+    <index referenceId="MAGEFAN_LOGIN_AS_CUSTOMER_CUSTOMER_ID" indexType="btree">
+      <column name="customer_id"/>
+    </index>
+    <index referenceId="MAGEFAN_LOGIN_AS_CUSTOMER_ADMIN_ID" indexType="btree">
+      <column name="admin_id"/>
+    </index>
+  </table>
+</schema>