diff --git a/README.md b/README.md
index 9ed16cbc..36e1987a 100644
--- a/README.md
+++ b/README.md
@@ -104,6 +104,8 @@ $iss = new IssueService(new ArrayConfiguration(
 - [Create Sub Task](#create-sub-task)
 - [Add Attachment](#add-attachment)
 - [Update issue](#update-issue)
+- [Change assignee](#change-assignee)
+- [Remove issue](#remove-issue)
 - [Add comment](#add-comment)
 - [Perform a transition on an issue](#perform-a-transition-on-an-issue)
 - [Perform an advanced search, using the JQL](#perform-an-advanced-search)
@@ -494,6 +496,54 @@ try {
 
 If you want to change the custom field type when updating an issue, you can call the *addCustomField* function just as you did for creating issue.
 
+#### Change Assignee
+
+```php
+<?php
+require 'vendor/autoload.php';
+
+use JiraRestApi\Issue\IssueService;
+use JiraRestApi\JiraException;
+
+$issueKey = "TEST-879";
+
+try {
+	$issueService = new IssueService();
+
+    // if assignee is -1, automatic assignee used.
+    // A null assignee will remove the assignee.
+    $assignee = 'newAssigneeName';
+
+    $ret = $issueService->changeAssignee($this->key, $assignee);
+
+    var_dump($ret);
+} catch (JiraException $e) {
+	$this->assertTrue(FALSE, "Change Assignee Failed : " . $e->getMessage());
+}
+```
+
+#### Remove Issue
+
+```php
+<?php
+require 'vendor/autoload.php';
+
+use JiraRestApi\Issue\IssueService;
+use JiraRestApi\JiraException;
+
+$issueKey = "TEST-879";
+
+try {
+	$issueService = new IssueService();
+
+    $ret = $issueService->deleteIssue($this->key);
+
+    var_dump($ret);
+} catch (JiraException $e) {
+	$this->assertTrue(FALSE, "Change Assignee Failed : " . $e->getMessage());
+}
+```
+
 #### Add comment
 
 ```php
diff --git a/src/Issue/IssueService.php b/src/Issue/IssueService.php
index a9a31612..808680a5 100644
--- a/src/Issue/IssueService.php
+++ b/src/Issue/IssueService.php
@@ -203,23 +203,29 @@ public function addComment($issueIdOrKey, $comment)
 
         return $comment;
     }
-    
+
     /**
-      * Change a issue assignee
-      *
-      * @param issueIdOrKey Issue id or key
-      * @param assignee array of assigne field informations
-      *
-      */
-    public function changeAssignee($issueIdOrKey, $assignee)
+     * Change a issue assignee
+     *
+     * @param Issue $issueIdOrKey
+     * @param Assigns $assigneeName Assigns an issue to a user.
+     *    If the assigneeName is "-1" automatic assignee is used.
+     *    A null name will remove the assignee.
+     * @return true | false
+     * @throws JiraException
+     *
+     */
+    public function changeAssignee($issueIdOrKey, $assigneeName)
     {
         $this->log->addInfo("changeAssignee=\n");
 
-        $data = json_encode($assignee);
+        $ar = ['name' => $assigneeName];
+
+        $data = json_encode($ar);
 
         $ret = $this->exec($this->uri."/$issueIdOrKey/assignee", $data, 'PUT');
 
-        $this->log->addInfo('change assignee of '.$issueIdOrKey.' to '.json_encode($assignee).' result='.var_export($ret, true));
+        $this->log->addInfo('change assignee of '.$issueIdOrKey.' to ' . $assigneeName .' result='.var_export($ret, true));
 
         return $ret;
     }
diff --git a/src/JiraClient.php b/src/JiraClient.php
index 8fe9db99..94ef2e7a 100644
--- a/src/JiraClient.php
+++ b/src/JiraClient.php
@@ -193,7 +193,7 @@ public function exec($context, $post_data = null, $custom_request = null)
 
             //The server successfully processed the request, but is not returning any content.
             if ($this->http_response == 204) {
-                return '';
+                return true;
             }
 
             // HostNotFound, No route to Host, etc Network error