diff --git a/BUGS b/BUGS
new file mode 100644
index 0000000..2ab6c30
--- /dev/null
+++ b/BUGS
@@ -0,0 +1,8 @@
+* Version 1.7 can't create wp-config.php when installing with WordPress 4.0
+
+	When install process notices that there's no wp-config.php, it tries to
+	create one from wp-config-sample.php. During that time, WordPress unsets
+	global $wpdb and calls require_wp_db() function.
+	That function newly instantiates wpdb class. SQLite Integration has no
+	way of intercepting that process.
+
diff --git a/ChangeLog b/ChangeLog
new file mode 100644
index 0000000..d270903
--- /dev/null
+++ b/ChangeLog
@@ -0,0 +1,8 @@
+2014-09-05  KOJIMA Toshiyasu
+
+	* version 1.7 release.
+	* update readme.txt and readme-ja.txt.
+
+2014-08-29  KOJIMA Toshiyasu
+
+	* Added ChangeLog and BUGS files.
diff --git a/db.php b/db.php
index 26169f4..b87178a 100644
--- a/db.php
+++ b/db.php
@@ -5,7 +5,7 @@
  * This file must be placed in the directory wordpress/wp-content/db.php.
  * WordPress loads this file automatically.
  *
- * @version 1.6.2
+ * @version 1.7
  * @package SQLite Integration
  * @author Kojima Toshiyasu
  *
diff --git a/readme-ja.txt b/readme-ja.txt
index 5352cf2..501901f 100644
--- a/readme-ja.txt
+++ b/readme-ja.txt
@@ -6,8 +6,8 @@ Tags: database, SQLite, PDO
 Author: Kojima Toshiyasu
 Author URI: http://dogwood.skr.jp/
 Requires at least: 3.3
-Tested up to: 3.9
-Stable tag: 1.6.3
+Tested up to: 4.0
+Stable tag: 1.7
 License: GPLv2
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -115,6 +115,10 @@ SQLite に戻りたいときには、この行を次のように変更するか
 
 == よくある質問 ==
 
+= 「データベース接続エラー」でインストールが止まります =
+
+wp-config.php を手動で作成することが必要です。WordPress に作らせようとすると、途中でインストールが止まります。
+
 = データベース・ファイルが作られません =
 
 ディレクトリやファイルを作るのに失敗するのは、多くの場合、PHPにその権限がないことが原因です。サーバの設定を確認するか、管理者に聞いてみてください。
@@ -160,10 +164,18 @@ SQLite に戻りたいときには、この行を次のように変更するか
 
 == Upgrade Notice ==
 
-メタクエリを使うときのバグを修正しました。自動アップグレードで失敗するようなら、FTPを使っての手動アップグレードを試してみてください。
+WordPress 4.0 での動作チェックをして、いくつかのバグを修正しました。アップグレードをお勧めします。自動アップグレードで失敗するようなら、FTPを使っての手動アップグレードを試してみてください。
 
 == Changelog ==
 
+= 1.7 (2014-09-05) =
+* エディタ画面で、添付ファイルの並べ替えができなかったのを修正しました。
+* CREATE クエリのバグを修正しました。
+* 128x128 アイコンと 256x256 アイコンを追加しました。
+* pcre.backtrack_limit が大きな値に設定されている場合、それを使うようにしました。
+* メタクエリの BETWEEN の扱いを変更しました。
+* WordPress 4.0 での動作チェックをしました。
+
 = 1.6.3 (2014-05-10) =
 * BETWEEN 比較をするメタクエリのバグを修正しました。
 * スペイン語カタログを追加しました。
diff --git a/readme.txt b/readme.txt
index 857d932..d48acd1 100644
--- a/readme.txt
+++ b/readme.txt
@@ -6,8 +6,8 @@ Tags: database, SQLite, PDO
 Author: Kojima Toshiyasu
 Author URI: http://dogwood.skr.jp/
 Requires at least: 3.3
-Tested up to: 3.9
-Stable tag: 1.6.3
+Tested up to: 4.0
+Stable tag: 1.7
 License: GPLv2
 License URI: http://www.gnu.org/licenses/gpl-2.0.html
 
@@ -115,6 +115,10 @@ If export or import fails for some reason, please visit our site and try another
 
 == Frequently Asked Questions ==
 
+= Install stops with 'Error establishing a database connection' =
+
+It is required that you should prepare wp-config.php manually. If you try to make WordPress create wp-config.php, you'll get that message and can't continue install process.
+
 = Database file is not created =
 
 The reason of failure in creating directory or files is often that PHP is not allowed to craete them. Please check your server setting or ask the administrator.
@@ -158,10 +162,17 @@ This plugin doesn't support 'WP_PLUGIN_URL' constant.
 
 == Upgrade Notice ==
 
-Fixed the bug about meta query with BETWEEN comparison which may cause some plugins to work correctly. Upgrade is recommended. When auto upgrading fails, please try manual upgrade via FTP.
+WordPress 4.0 compatibility is checked and some bugs are fixed. Upgrade is recommended. When auto upgrading fails, please try manual upgrade via FTP.
 
 == Changelog ==
 
+= 1.7 (2014-09-05) =
+* Fixed the bug about changing the order of the attachment file in the editor screen.
+* Fixed the bug about the manipulation of CREATE query.
+* Added an 128x128 icon and 256x256 icon.
+* Change for checking the user defined value of pcre.backtrack_limit and using it.
+* WordPress 4.0 compatibilitiy checked.
+
 = 1.6.3 (2014-05-10) =
 * Fixed the bug about manipulating meta query with BETWEEN comparison.
 * Added the Spanish langugae support.
diff --git a/sqlite-integration.php b/sqlite-integration.php
index 2fa1c2b..668c4c1 100644
--- a/sqlite-integration.php
+++ b/sqlite-integration.php
@@ -4,7 +4,7 @@ Plugin Name: SQLite Integration
 Plugin URI: http://dogwood.skr.jp/wordpress/sqlite-integration/
 Description: SQLite Integration is the plugin that enables WordPress to use SQLite. If you don't have MySQL and want to build a WordPress website, it's for you.
 Author: Kojima Toshiyasu
-Version: 1.6.3
+Version: 1.7
 Author URI: http://dogwood.skr.jp
 Text Domain: sqlite-integration
 Domain Path: /languages
@@ -44,7 +44,7 @@ $siteurl = get_option('siteurl');
 /*
  * Defines basic constants.
  */
-define('SQLITE_INTEGRATION_VERSION', '1.6.2');
+define('SQLITE_INTEGRATION_VERSION', '1.7');
 define('SQLiteDir', dirname(plugin_basename(__FILE__)));
 define('SQLiteFilePath', dirname(__FILE__));
 define('SQLiteDirName', basename(SQLiteFilePath));
diff --git a/utilities/utility.php b/utilities/utility.php
index cd08306..0ad9eac 100644
--- a/utilities/utility.php
+++ b/utilities/utility.php
@@ -39,7 +39,7 @@ class SQLiteIntegrationUtils {
 		return;
 		$notice_string = __('Upgrading Notice: To finish upgrading, please activate SQLite Integration and go Setting >> SQLite Integration >> Miscellaneous, and click the button "update" at the bottom of the page. Or else replace wp-content/db.php with the one in sqlite-integration directory manually.', 'sqlite-integration');
 		$current_version = defined('SQLITE_INTEGRATION_VERSION') ? SQLITE_INTEGRATION_VERSION : '';
-		if (version_compare($current_version, '1.6.2', '=')) return;
+		if (version_compare($current_version, '1.7', '=')) return;
 		$version = '';
 		if (defined('WP_CONTENT_DIR')) {
 			$path = WP_CONTENT_DIR . '/db.php';