diff --git a/Command.php b/Command.php
index 594c4449..d31105bc 100644
--- a/Command.php
+++ b/Command.php
@@ -504,7 +504,7 @@ public function aliasActions(array $actions)
      * @return mixed
      * @throws Exception
      * @throws \yii\base\InvalidConfigException
-     * @see http://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-update-settings.html
+     * @see https://www.elasticsearch.org/guide/en/elasticsearch/reference/current/indices-update-settings.html
      * @since 2.0.4
      */
     public function updateSettings($index, $setting, $options = [])
diff --git a/Connection.php b/Connection.php
index 502d1cbb..485dcc0c 100644
--- a/Connection.php
+++ b/Connection.php
@@ -108,7 +108,7 @@ class Connection extends Component
     public $dslVersion = 5;
 
     /**
-     * @var resource the curl instance returned by [curl_init()](http://php.net/manual/en/function.curl-init.php).
+     * @var resource the curl instance returned by [curl_init()](https://php.net/manual/en/function.curl-init.php).
      */
     private $_curl;
 
@@ -434,7 +434,7 @@ protected function httpRequest($method, $url, $requestBody = null, $raw = false)
             CURLOPT_USERAGENT      => 'Yii Framework ' . Yii::getVersion() . ' ' . __CLASS__,
             CURLOPT_RETURNTRANSFER => false,
             CURLOPT_HEADER         => false,
-            // http://www.php.net/manual/en/function.curl-setopt.php#82418
+            // https://www.php.net/manual/en/function.curl-setopt.php#82418
             CURLOPT_HTTPHEADER     => [
                 'Expect:',
                 'Content-Type: application/json',
diff --git a/README.md b/README.md
index 099bde24..75cbce04 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@
     <br>
 </p>
 
-This extension provides the [Elasticsearch](https://www.elastic.co/products/elasticsearch) integration for the [Yii framework 2.0](http://www.yiiframework.com).
+This extension provides the [Elasticsearch](https://www.elastic.co/products/elasticsearch) integration for the [Yii framework 2.0](https://www.yiiframework.com).
 It includes basic querying/search support and also implements the `ActiveRecord` pattern that allows you to store active
 records in Elasticsearch.
 
@@ -29,7 +29,7 @@ Depending on the version of Elasticsearch you are using you need a different ver
 Installation
 ------------
 
-The preferred way to install this extension is through [composer](http://getcomposer.org/download/):
+The preferred way to install this extension is through [composer](https://getcomposer.org/download/):
 
 
 ```
diff --git a/composer.json b/composer.json
index 2c9c037c..1b15a6f1 100644
--- a/composer.json
+++ b/composer.json
@@ -6,8 +6,8 @@
     "license": "BSD-3-Clause",
     "support": {
         "issues": "https://github.com/yiisoft/yii2-elasticsearch/issues",
-        "forum": "http://www.yiiframework.com/forum/",
-        "wiki": "http://www.yiiframework.com/wiki/",
+        "forum": "https://www.yiiframework.com/forum/",
+        "wiki": "https://www.yiiframework.com/wiki/",
         "irc": "ircs://irc.libera.chat:6697/yii",
         "source": "https://github.com/yiisoft/yii2-elasticsearch"
     },