diff --git a/src/Http/Request.php b/src/Http/Request.php
index d12bffe..e66a7e5 100644
--- a/src/Http/Request.php
+++ b/src/Http/Request.php
@@ -88,13 +88,31 @@ protected function handleResponse(Response $response)
                 throw new ItemNotFoundException(isset($content->error) ? $content->error : "Error unknown.");
             }
 
-            throw new PipedriveException(
-                isset($content->error) ? $content->error->message : "Error unknown."
-            );
+            $this->throwPipedriveException($content);
         }
 
         return $response;
     }
+    
+    /**
+     * Throws PipedriveException with message depending on content.
+     *
+     * @param string $content
+     */
+    protected function throwPipedriveException($content)
+    {
+        if (!isset($content->error))
+        {
+            throw new PipedriveException('Error unknown.');
+        }
+        
+        if (property_exists($content->error, 'message'))
+        {
+            throw new PipedriveException($content->error->message);
+        }
+        
+        throw new PipedriveException($content->error);
+    }
 
     /**
      * Set the endpoint name.