diff --git a/src/Mailchimp.php b/src/Mailchimp.php
index e709683..512fd51 100644
--- a/src/Mailchimp.php
+++ b/src/Mailchimp.php
@@ -299,6 +299,7 @@ public function request($method, $path, $tokens = NULL, $parameters = NULL, $bat
       'headers' => [
         'Authorization' => $this->api_user . ' ' . $this->api_key,
       ],
+      'convert_to_object' => TRUE
     ];
 
     // Add trigger error header if a debug error code has been set.
@@ -306,6 +307,14 @@ public function request($method, $path, $tokens = NULL, $parameters = NULL, $bat
       $options['headers']['X-Trigger-Error'] = $this->debug_error_code;
     }
 
+    // Set the object conversion status if its passed in.
+    if (isset($parameters['convert_to_object'])) {
+      $options['convert_to_object'] = $parameters['convert_to_object'];
+
+      // Remove status from being sent to MailChimp.
+      unset($parameters['convert_to_object']);
+    }
+
     if ($this->use_curl) {
       return $this->handleRequestCURL($method, $this->endpoint . $path, $options, $parameters, $returnAssoc);
     }
@@ -327,7 +336,12 @@ public function handleRequest($method, $uri = '', $options = [], $parameters = [
       }
       else {
         // Send parameters as JSON in request body.
-        $options['json'] = (object) $parameters;
+        if ($options['convert_to_object']) {
+          $options['json'] = (object) $parameters;
+        }
+        else {
+          $options['json'] = $parameters;
+        }
       }
     }
 
diff --git a/src/MailchimpLists.php b/src/MailchimpLists.php
index 349f42b..0561910 100644
--- a/src/MailchimpLists.php
+++ b/src/MailchimpLists.php
@@ -387,8 +387,6 @@ public function addSegment($list_id, $name, $parameters = [], $batch = FALSE) {
    *   The ID of the list.
    * @param int $segment_id
    *   The ID of the segment.
-   * @param string $name
-   *   The name of the segment.
    * @param array $parameters
    *   Associative array of optional request parameters.
    * @param bool $batch
@@ -398,17 +396,17 @@ public function addSegment($list_id, $name, $parameters = [], $batch = FALSE) {
    *
    * @see http://developer.mailchimp.com/documentation/mailchimp/reference/lists/segments/#edit-patch_lists_list_id_segments_segment_id
    */
-  public function updateSegment($list_id, $segment_id, $name, $parameters = [], $batch = FALSE) {
+  public function updateSegment($list_id, $segment_id, $parameters = [], $batch = FALSE) {
     $tokens = [
       'list_id' => $list_id,
       'segment_id' => $segment_id,
     ];
 
     $parameters += [
-      'name' => $name,
+      'convert_to_object' => FALSE
     ];
 
-    return $this->request('PATCH', '/lists/{list_id}/segments/{segment_id}', $tokens, $parameters, $batch);
+    return $this->request('POST', '/lists/{list_id}/segments/{segment_id}', $tokens, $parameters, $batch);
   }
 
   /**
diff --git a/tests/MailchimpListsTest.php b/tests/MailchimpListsTest.php
index 6a83863..75773bf 100644
--- a/tests/MailchimpListsTest.php
+++ b/tests/MailchimpListsTest.php
@@ -249,19 +249,23 @@ public function testAddSegment() {
   public function testUpdateSegment() {
     $list_id = '57afe96172';
     $segment_id = '49381';
-    $name = 'Updated Test Segment';
+    $emails = array(
+      'members_to_add' => array(
+        'new-employee@mailchimp.com'
+      )
+    );
 
     $mc = new MailchimpLists();
-    $mc->updateSegment($list_id, $segment_id, $name);
+    $mc->updateSegment($list_id, $segment_id, $emails);
 
-    $this->assertEquals('PATCH', $mc->getClient()->method);
+    $this->assertEquals('POST', $mc->getClient()->method);
     $this->assertEquals($mc->getEndpoint() . '/lists/' . $list_id . '/segments/' . $segment_id, $mc->getClient()->uri);
 
     $this->assertNotEmpty($mc->getClient()->options['json']);
 
     $request_body = $mc->getClient()->options['json'];
 
-    $this->assertEquals($name, $request_body->name);
+    $this->assertEquals('new-employee@mailchimp.com', $request_body['members_to_add'][0]);
   }
 
   /**