diff --git a/src/Redis.php b/src/Redis.php
index 55eab0a..145d673 100644
--- a/src/Redis.php
+++ b/src/Redis.php
@@ -19,6 +19,10 @@ class Redis
     const OPT_READ_TIMEOUT      = 3;
     const OPT_SCAN              = 4;
     const OPT_SLAVE_FAILOVER    = 5;
+    const OPT_TCP_KEEPALIVE     = 6;
+    const OPT_COMPRESSION       = 7;
+    const OPT_REPLY_LITERAL     = 8;
+    const OPT_COMPRESSION_LEVEL = 9;
 
     /**
      * Cluster options
@@ -32,6 +36,8 @@ class Redis
      */
     const SCAN_NORETRY          = 0;
     const SCAN_RETRY            = 1;
+    const SCAN_PREFIX           = 2;
+    const SCAN_NOPREFIX         = 3;
 
     /**
      * Serializers
@@ -42,6 +48,21 @@ class Redis
     const SERIALIZER_MSGPACK    = 3;
     const SERIALIZER_JSON       = 4;
 
+    /**
+     * Compressions
+     */
+    const COMPRESSION_NONE      = 0;
+    const COMPRESSION_LZF       = 1;
+    const COMPRESSION_ZSTD      = 2;
+    const COMPRESSION_LZ4       = 3;
+
+    /**
+     * Compression ZSTD levels
+     */
+    const COMPRESSION_ZSTD_MIN = 1;
+    const COMPRESSION_ZSTD_DEFAULT = 3;
+    const COMPRESSION_ZSTD_MAX = 22;
+
     /**
      * Multi
      */
@@ -58,6 +79,7 @@ class Redis
     const REDIS_LIST            = 3;
     const REDIS_ZSET            = 4;
     const REDIS_HASH            = 5;
+    const REDIS_STREAM          = 6;
 
     /**
      * Creates a Redis client
@@ -1527,8 +1549,9 @@ public function sCard($key)
      * Removes and returns a random element from the set value at Key.
      *
      * @param string $key
+     * @param int    $count [optional]
      *
-     * @return string|mixed|bool "popped" value
+     * @return string|mixed|array|bool "popped" values
      * bool FALSE if set identified by key is empty or doesn't exist.
      *
      * @link    https://redis.io/commands/spop
@@ -1539,9 +1562,19 @@ public function sCard($key)
      * $redis->sAdd('key1' , 'set3');   // 'key1' => {'set3', 'set1', 'set2'}
      * $redis->sPop('key1');            // 'set1', 'key1' => {'set3', 'set2'}
      * $redis->sPop('key1');            // 'set3', 'key1' => {'set2'}
+     *
+     * // With count
+     * $redis->sAdd('key2', 'set1', 'set2', 'set3');
+     * var_dump( $redis->sPop('key2', 3) ); // Will return all members but in no particular order
+     *
+     * // array(3) {
+     * //   [0]=> string(4) "set2"
+     * //   [1]=> string(4) "set3"
+     * //   [2]=> string(4) "set1"
+     * // }
      * </pre>
      */
-    public function sPop($key)
+    public function sPop($key, $count = 1)
     {
     }
 
@@ -1569,7 +1602,7 @@ public function sPop($key)
      *
      * // array(2) {
      * //   [0]=> string(2) "one"
-     * //   [1]=> string(2) "three"
+     * //   [1]=> string(5) "three"
      * // }
      * </pre>
      */
@@ -2155,15 +2188,19 @@ public function dbSize()
     }
 
     /**
-     * Authenticate the connection using a password.
+     * Authenticate the connection using a password or a username and password..
      * Warning: The password is sent in plain-text over the network.
      *
-     * @param string $password
+     * @param mixed $password
      *
      * @return bool TRUE if the connection is authenticated, FALSE otherwise
      *
      * @link    https://redis.io/commands/auth
-     * @example $redis->auth('foobared');
+     * @example
+     * <pre>
+     * $redis->auth('bar'); // Authenticate with the password 'bar'
+     * $redis->auth(['user' => 'foo', 'pass' => 'bar]); // Authenticate with the username 'foo', and password 'bar' 
+     * </pre>
      */
     public function auth($password)
     {
@@ -2914,7 +2951,7 @@ public function brpoplpush($srcKey, $dstKey, $timeout)
      * @example
      * <pre>
      * <pre>
-     * $redis->zAdd('z', 1, 'v1', 2, 'v2', 3, 'v3', 4, 'v4' );  // int(2)
+     * $redis->zAdd('z', 1, 'v1', 2, 'v2', 3, 'v3', 4, 'v4' );  // int(4)
      * $redis->zRem('z', 'v2', 'v3');                           // int(2)
      * $redis->zAdd('z', ['NX'], 5, 'v5');                      // int(1)
      * $redis->zAdd('z', ['NX'], 6, 'v5');                      // int(0)
@@ -3526,6 +3563,52 @@ public function bzPopMin($key1, $key2, $timeout)
     {
     }
 
+    /**
+     * Can pop the highest scoring members from one ZSET.
+     *
+     * @param string $key
+     * @param int $count
+     *
+     * @return array Either an array with the key member and score of the highest element or an empty array
+     * if there is no element to pop.
+     *
+     * @since >= 5.0
+     * @link https://redis.io/commands/zpopmax
+     * @example
+     * <pre>
+     * // Pop the *lowest* scoring member from set `zs1`.
+     * $redis->zPopMax('zs1');
+     * // Pop the *lowest* 3 scoring member from set `zs1`.
+     * $redis->zPopMax('zs1', 3);
+     * </pre>
+     */
+    public function zPopMax($key, $count = 1)
+    {
+    }
+
+    /**
+     * Can pop the lowest scoring members from one ZSET.
+     *
+     * @param string $key
+     * @param int $count
+     *
+     * @return array Either an array with the key member and score of the lowest element or an empty array
+     * if there is no element to pop.
+     *
+     * @since >= 5.0
+     * @link https://redis.io/commands/zpopmin
+     * @example
+     * <pre>
+     * // Pop the *lowest* scoring member from set `zs1`.
+     * $redis->zPopMin('zs1');
+     * // Pop the *lowest* 3 scoring member from set `zs1`.
+     * $redis->zPopMin('zs1', 3);
+     * </pre>
+     */
+    public function zPopMin($key, $count = 1)
+    {
+    }
+
     /**
      * Adds a value to the hash stored at key. If this value is already in the hash, FALSE is returned.
      *