diff --git a/src/ConversationManager.php b/src/ConversationManager.php
index b7d1c2c..31c150a 100644
--- a/src/ConversationManager.php
+++ b/src/ConversationManager.php
@@ -21,10 +21,10 @@ public function __construct(Application $app = null)
         $this->app = $app;
     }
 
-    public function findByQueryString($query, $from = 0, $size = 99999, $sort = "")
+    public function findByQueryString($query, $from = 0, $size = 99999, $sort = "", $msg_query = "")
     {
         $query    = urlencode($query);
-        $response = $this->fireRequest("GET", "/search?q={$query}&from={$from}&size={$size}&sort={$sort}");
+        $response = $this->fireRequest("GET", "/search?q={$query}&messages_query={$msg_query}&from={$from}&size={$size}&sort={$sort}");
 
         $response["hits"] = array_map(
             function ($hit) {