diff --git a/framework/CHANGELOG.md b/framework/CHANGELOG.md
index 31c283b..d477ee5 100644
--- a/framework/CHANGELOG.md
+++ b/framework/CHANGELOG.md
@@ -179,6 +179,7 @@ Yii Framework 2 Change Log
 - Enh: Added support for array attributes in `in` validator (creocoder)
 - Enh: Improved `yii\helpers\Inflector::slug` to support more cases for Russian, Hebrew and special characters (samdark)
 - Enh: ListView now uses the widget ID in the base tag, consistent to gridview (cebe)
+- Enh #4520: yii\caching/MemCache.php add sasl support (xjflyttp)
 - Chg #2287: Split `yii\db\ColumnSchema::typecast()` into two methods `phpTypecast()` and `dbTypecast()` to allow specifying PDO type explicitly (cebe)
 - Chg #2898: `yii\console\controllers\AssetController` is now using hashes instead of timestamps (samdark)
 - Chg #2913: RBAC `DbManager` is now initialized via migration (samdark)
diff --git a/framework/caching/MemCache.php b/framework/caching/MemCache.php
index ea79cac..3c38b1f 100644
--- a/framework/caching/MemCache.php
+++ b/framework/caching/MemCache.php
@@ -84,6 +84,17 @@ class MemCache extends Cache
     public $options;
 
     /**
+     * @var string memcached sasl username
+     * @see http://php.net/manual/en/memcached.setsaslauthdata.php
+     */
+    public $username;
+    /**
+     * @var string memcached sasl password
+     * @see http://php.net/manual/en/memcached.setsaslauthdata.php
+     */
+    public $password;
+
+    /**
      * @var \Memcache|\Memcached the Memcache instance
      */
     private $_cache = null;
@@ -201,6 +212,10 @@ class MemCache extends Cache
 
             if ($this->useMemcached) {
                 $this->_cache = $this->persistentId !== null ? new \Memcached($this->persistentId) : new \Memcached;
+                if ($this->username !== null || $this->password !== null) {
+                    $this->_cache->setOption(\Memcached::OPT_BINARY_PROTOCOL, true);
+                    $this->_cache->setSaslAuthData($this->username, $this->password);
+                }
                 if (!empty($this->options)) {
                     $this->_cache->setOptions($this->options);
                 }