diff --git a/composer.json b/composer.json
index 734bee9..7dfe4f8 100644
--- a/composer.json
+++ b/composer.json
@@ -1,5 +1,5 @@
 {
-    "name": "nategood/httpful",
+    "name": "michelwilhelm/httpful",
     "description": "A Readable, Chainable, REST friendly, PHP HTTP Client",
     "homepage": "http://github.com/nategood/httpful",
     "license": "MIT",
diff --git a/src/Httpful/Request.php b/src/Httpful/Request.php
index f0cb789..ca1fac4 100755
--- a/src/Httpful/Request.php
+++ b/src/Httpful/Request.php
@@ -950,7 +950,9 @@ public function _curlPrep()
     public function _determineLength($str)
     {
         if (function_exists('mb_strlen')) {
-            return mb_strlen($str, '8bit');
+            if (is_string($str)) {
+                return mb_strlen($str, '8bit');
+            }
         } else {
             return strlen($str);
         }