diff --git a/README.md b/README.md
index b93a740..981a7f9 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
     <br>
 </p>
 
-Yii 2 Basic Project Template is a skeleton [Yii 2](http://www.yiiframework.com/) application best for
+Yii 2 Basic Project Template is a skeleton [Yii 2](https://www.yiiframework.com/) application best for
 rapidly creating small projects.
 
 The template contains the basic features including user login/logout and a contact page.
@@ -45,8 +45,8 @@ INSTALLATION
 
 ### Install via Composer
 
-If you do not have [Composer](http://getcomposer.org/), you may install it by following the instructions
-at [getcomposer.org](http://getcomposer.org/doc/00-intro.md#installation-nix).
+If you do not have [Composer](https://getcomposer.org/), you may install it by following the instructions
+at [getcomposer.org](https://getcomposer.org/doc/00-intro.md#installation-nix).
 
 You can then install this project template using the following command:
 
@@ -63,7 +63,7 @@ http://localhost/basic/web/
 
 ### Install from an Archive File
 
-Extract the archive file downloaded from [yiiframework.com](http://www.yiiframework.com/download/) to
+Extract the archive file downloaded from [yiiframework.com](https://www.yiiframework.com/download/) to
 a directory named `basic` that is directly under the Web root.
 
 Set cookie validation key in `config/web.php` file to some random secret string:
@@ -131,7 +131,7 @@ return [
 TESTING
 -------
 
-Tests are located in `tests` directory. They are developed with [Codeception PHP Testing Framework](http://codeception.com/).
+Tests are located in `tests` directory. They are developed with [Codeception PHP Testing Framework](https://codeception.com/).
 By default, there are 3 test suites:
 
 - `unit`
@@ -164,7 +164,7 @@ To execute acceptance tests do the following:
     composer update  
     ```
 
-4. Download [Selenium Server](http://www.seleniumhq.org/download/) and launch it:
+4. Download [Selenium Server](https://www.seleniumhq.org/download/) and launch it:
 
     ```
     java -jar ~/selenium-server-standalone-x.xx.x.jar
diff --git a/requirements.php b/requirements.php
index 6cf322e..c1a6bf6 100644
--- a/requirements.php
+++ b/requirements.php
@@ -105,22 +105,22 @@ $requirements = array(
         'name' => 'Memcache extension',
         'mandatory' => false,
         'condition' => extension_loaded('memcache') || extension_loaded('memcached'),
-        'by' => '<a href="http://www.yiiframework.com/doc-2.0/yii-caching-memcache.html">MemCache</a>',
-        'memo' => extension_loaded('memcached') ? 'To use memcached set <a href="http://www.yiiframework.com/doc-2.0/yii-caching-memcache.html#$useMemcached-detail">MemCache::useMemcached</a> to <code>true</code>.' : ''
+        'by' => '<a href="https://www.yiiframework.com/doc-2.0/yii-caching-memcache.html">MemCache</a>',
+        'memo' => extension_loaded('memcached') ? 'To use memcached set <a href="https://www.yiiframework.com/doc-2.0/yii-caching-memcache.html#$useMemcached-detail">MemCache::useMemcached</a> to <code>true</code>.' : ''
     ),
     // CAPTCHA:
     array(
         'name' => 'GD PHP extension with FreeType support',
         'mandatory' => false,
         'condition' => $gdOK,
-        'by' => '<a href="http://www.yiiframework.com/doc-2.0/yii-captcha-captcha.html">Captcha</a>',
+        'by' => '<a href="https://www.yiiframework.com/doc-2.0/yii-captcha-captcha.html">Captcha</a>',
         'memo' => $gdMemo,
     ),
     array(
         'name' => 'ImageMagick PHP extension with PNG support',
         'mandatory' => false,
         'condition' => $imagickOK,
-        'by' => '<a href="http://www.yiiframework.com/doc-2.0/yii-captcha-captcha.html">Captcha</a>',
+        'by' => '<a href="https://www.yiiframework.com/doc-2.0/yii-captcha-captcha.html">Captcha</a>',
         'memo' => $imagickMemo,
     ),
     // PHP ini :
@@ -153,7 +153,7 @@ if (!version_compare(phpversion(), '5.5', '>=')) {
         'name' => 'APC extension',
         'mandatory' => false,
         'condition' => extension_loaded('apc'),
-        'by' => '<a href="http://www.yiiframework.com/doc-2.0/yii-caching-apccache.html">ApcCache</a>',
+        'by' => '<a href="https://www.yiiframework.com/doc-2.0/yii-caching-apccache.html">ApcCache</a>',
     );
 }
 
diff --git a/yii b/yii
index 2a2e8ed..1d0008f 100755
--- a/yii
+++ b/yii
@@ -3,9 +3,9 @@
 /**
  * Yii console bootstrap file.
  *
- * @link http://www.yiiframework.com/
+ * @link https://www.yiiframework.com/
  * @copyright Copyright (c) 2008 Yii Software LLC
- * @license http://www.yiiframework.com/license/
+ * @license https://www.yiiframework.com/license/
  */
 
 defined('YII_DEBUG') or define('YII_DEBUG', true);
diff --git a/yii.bat b/yii.bat
index d516b3a..ce14c92 100644
--- a/yii.bat
+++ b/yii.bat
@@ -4,9 +4,9 @@ rem -------------------------------------------------------------
 rem  Yii command line bootstrap script for Windows.
 rem
 rem  @author Qiang Xue <qiang.xue@gmail.com>
-rem  @link http://www.yiiframework.com/
+rem  @link https://www.yiiframework.com/
 rem  @copyright Copyright (c) 2008 Yii Software LLC
-rem  @license http://www.yiiframework.com/license/
+rem  @license https://www.yiiframework.com/license/
 rem -------------------------------------------------------------
 
 @setlocal