diff --git a/composer.json b/composer.json
index 7f2a501..cae6216 100644
--- a/composer.json
+++ b/composer.json
@@ -16,7 +16,7 @@
         "issues": "https://github.com/gidkom/php-openfire-restapi/issues"
     },
     "require": {
-        "php": "^7.2.5",
+        "php": "^7.2.5 || ^8.0",
         "ext-curl": "*",
         "guzzlehttp/guzzle": "^7.0"
     },
diff --git a/src/Gidkom/OpenFireRestApi/OpenFireRestApi.php b/src/Gidkom/OpenFireRestApi/OpenFireRestApi.php
index 80e37b1..983fe96 100644
--- a/src/Gidkom/OpenFireRestApi/OpenFireRestApi.php
+++ b/src/Gidkom/OpenFireRestApi/OpenFireRestApi.php
@@ -53,7 +53,7 @@ public function getUser($username)
      * @param   string|false    $email      Email   (Optional)
      * @return  json|false                 Json with data or error, or False when something went fully wrong
      */
-    public function addUser($username, $password, $name=false, $email=false)
+    public function addUser($username, $password, $name=null, $email=null)
     {
         $endpoint = '/users'; 
         return $this->doRequest('POST', $endpoint, compact('username', 'password','name','email'));
@@ -82,10 +82,10 @@ public function deleteUser($username)
      * @param   string[]|false  $groups     Groups (Optional)
      * @return  json|false                 Json with data or error, or False when something went fully wrong
      */
-    public function updateUser($username, $password, $name=false, $email=false, $groups=false)
+    public function updateUser($username, $password, $name=null, $email=null)
     {
         $endpoint = '/users/'.$username; 
-        return $this->doRequest('PUT', $endpoint, compact('username', 'password','name','email', 'groups'));
+        return $this->doRequest('PUT', $endpoint, compact('username', 'password','name','email'));
     }
 
 
@@ -190,10 +190,10 @@ public function userRosters($username)
      * @param   int|false       $subscriptionType   	Subscription (Optional)
      * @return  json|false                     		Json with data or error, or False when something went fully wrong
      */
-    public function addToRoster($username, $jid, $name=false, $subscriptionType=false)
+    public function addToRoster($username, $jid, $nickname=null, $subscriptionType=null)
     {
         $endpoint = '/users/'.$username.'/roster';
-        return $this->doRequest('POST', $endpoint, compact('jid','name','subscriptionType'));
+        return $this->doRequest('POST', $endpoint, compact('jid','nickname','subscriptionType'));
     }
 
 
@@ -219,10 +219,10 @@ public function deleteFromRoster($username, $jid)
      * @param   int|false       $subscriptionType   Subscription (Optional)
      * @return  json|false                          Json with data or error, or False when something went fully wrong
      */
-    public function updateRoster($username, $jid, $nickname=false, $subscriptionType=false)
+    public function updateRoster($username, $jid, $nickname=null, $subscriptionType=null)
     {
         $endpoint = '/users/'.$username.'/roster/'.$jid;
-        return $this->doRequest('PUT', $endpoint, $jid, compact('jid','username','subscriptionType'));     
+        return $this->doRequest('PUT', $endpoint, compact('jid', 'subscriptionType', 'nickname'));
     }