diff --git a/calendar.php b/calendar.php
index 25bbad4..0a99367 100644
--- a/calendar.php
+++ b/calendar.php
@@ -110,7 +110,7 @@ if ($bHasContactsCalendar) {
 
         // Get contact id from event
         $aPreferences = $oGadget->getPreferences();
-        if (!isset($aPreferences['goo.contactsContactId']) ) {
+        if (!isset($aPreferences['goo.contactsContactId'])) { 
             continue;        
         }
         $sContactId = $aPreferences['goo.contactsContactId'];
@@ -128,29 +128,28 @@ if ($bHasContactsCalendar) {
         if (!isset($aContacts[$sContactId])) {
             // Get contact details from contact id
             $sUrl = sprintf('https://www.google.com/m8/feeds/contacts/%s/full/%s?v=3.0', CONTACTS_USER_EMAIL, $sContactId);
-            $oHttpRequest = new Google_Http_Request($sUrl);
-            $oHttpRequest = $oAuth->sign($oHttpRequest);
-            $aResponse = $oClient->getIo()->executeRequest($oHttpRequest);
-            
+            $oHttpClient = $oClient->authorize();
+            $oHttpRequest =  new GuzzleHttp\Psr7\Request('GET', $sUrl);
+            $sResponse = $oHttpClient->send($oHttpRequest)->getBody()->getContents();
+
             // Parse XML to fetch birthday
-            $sXml = str_replace(array('gd:', 'gContact:'), null, $aResponse[0]);    
+            $sXml = str_replace(array('gd:', 'gContact:'), null, $sResponse);    
             $oXml = simplexml_load_string($sXml);
-            $aBirthday = (array) $oXml->birthday->attributes();
-            $sDate = current(current($aBirthday));
+            $sDate = ((array) $oXml->birthday)['@attributes']['when'];
 
             // Save birthday date
             $aContacts[$sContactId][CALENDAR_BIRTHDAY_NAME] = $sDate;
 
             // Iterate all events of contact
-            $aEvents = (array) $oXml->event;
-            while (($oEvent = next($aEvents)) !== false) {
-                $aEvent = (array) $oEvent;
-                $sEvent = current(current($aEvent));
-                $sDate = current(current(next($aEvent)));
-
-                // Save other event date
-                $aContacts[$sContactId][$sEvent] = $sDate;
-            }
+            #$aEvents = (array) $oXml->event;
+            #while (($oEvent = next($aEvents)) !== false) {
+            #    $aEvent = (array) $oEvent;
+            #    $sEvent = current(current($aEvent));
+            #    $sDate = current(current(next($aEvent)));
+            #
+            #    // Save other event date
+            #    $aContacts[$sContactId][$sEvent] = $sDate;
+            #}
         }
 
         // Get date of current event
diff --git a/composer.json b/composer.json
index a72b68f..c2e84f3 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,5 @@
 {
     "require": {
-        "google/apiclient": "1.1.2"
+        "google/apiclient": "2.2.3"
     }
 }
\ No newline at end of file
diff --git a/settings.php b/settings.php
index f2f43e3..adedd51 100644
--- a/settings.php
+++ b/settings.php
@@ -5,7 +5,7 @@ define('CLIENT_SECRET', '');
 define('REDIRECT_URI', sprintf('http://%s%s', $_SERVER['HTTP_HOST'], $_SERVER['PHP_SELF']));
 
 // Calendar preferences
-define('CONTACTS_CALENDAR_ID', '#contacts@group.v.calendar.google.com');
+define('CONTACTS_CALENDAR_ID', 'addressbook#contacts@group.v.calendar.google.com');
 define('TARGET_CALENDAR_SUMMARY', 'Birthdays');
 define('CALENDAR_BIRTHDAY_NAME', 'birthday');
 define('CONTACTS_USER_EMAIL', 'default');