diff --git a/src/Repo.php b/src/Repo.php
index 03dcfb1..dac849d 100644
--- a/src/Repo.php
+++ b/src/Repo.php
@@ -95,9 +95,9 @@ class Repo{
     return new Issue($this,$data);
   }
 
-  public function addAttachment($path,$type='image/png'){
-    $url="repos/{$this->user}/{$this->repo}/releases/1/assets?name=test";
-    $args=['attachment'=>new \CurlFile($path, $type, 'filename.png')];
+  public function addReleaseAttachment($releaseId,$path){
+    $url="repos/{$this->user}/{$this->repo}/releases/$releaseId/assets?name=test";
+    $args=['attachment'=>new \CurlFile($path)];
     $data=$this->client->request($url,'FORM',$args);
     return $data;
   }