diff --git a/composer.lock b/composer.lock
index ad2bce3..a664180 100644
--- a/composer.lock
+++ b/composer.lock
@@ -57,16 +57,16 @@
         },
         {
             "name": "squizlabs/php_codesniffer",
-            "version": "2.6.2",
+            "version": "2.7.1",
             "source": {
                 "type": "git",
                 "url": "https://github.com/squizlabs/PHP_CodeSniffer.git",
-                "reference": "4edb770cb853def6e60c93abb088ad5ac2010c83"
+                "reference": "9b324f3a1132459a7274a0ace2e1b766ba80930f"
             },
             "dist": {
                 "type": "zip",
-                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/4edb770cb853def6e60c93abb088ad5ac2010c83",
-                "reference": "4edb770cb853def6e60c93abb088ad5ac2010c83",
+                "url": "https://api.github.com/repos/squizlabs/PHP_CodeSniffer/zipball/9b324f3a1132459a7274a0ace2e1b766ba80930f",
+                "reference": "9b324f3a1132459a7274a0ace2e1b766ba80930f",
                 "shasum": ""
             },
             "require": {
@@ -131,7 +131,7 @@
                 "phpcs",
                 "standards"
             ],
-            "time": "2016-07-13 23:29:13"
+            "time": "2016-11-30 04:02:31"
         }
     ],
     "aliases": [],
diff --git a/phpcs.xml b/phpcs.xml
index 2114335..13abdf8 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -6,5 +6,7 @@
     
     <arg name="extensions" value="php"/>  
         
-    <rule ref="phpcs/PHPAMI"/>           
+    <rule ref="phpcs/PHPAMI"/>
+    
+    <config name="php_version" value="50400"/>           
 </ruleset>
diff --git a/src/Ami.php b/src/Ami.php
index 73dd4bd..0c27094 100644
--- a/src/Ami.php
+++ b/src/Ami.php
@@ -166,7 +166,13 @@ public function sendRequest($action, array $parameters = [])
     {
         $req = 'Action: '.$action."\r\n";
         foreach ($parameters as $var => $val) {
-            $req .= $var.': '.$val."\r\n";
+            if (is_array($val) === true) { // only supported by Asterisk > 1.4
+                foreach ($val as $k => $v) {
+                    $req .= $var.': '.$k.'='.$v."\r\n";
+                }
+            } else {
+                $req .= $var.': '.$val."\r\n";
+            }
         }
 
         $req .= "\r\n";