diff --git a/dislocker_client.py b/dislocker_client.py
index 1f0353e..6c10b72 100644
--- a/dislocker_client.py
+++ b/dislocker_client.py
@@ -85,7 +85,7 @@ class App(customtkinter.CTk):
         self.toast()
         self.destroy()
 
-    def delete_appdata(**kwargs):
+    def delete_appdata(self, **kwargs):
         process_name = kwargs["process_name"]
         dir_path = kwargs["dir_path"]