diff --git a/docs/adr/0053-web-socket-data-synchronization.md b/docs/adr/0053-web-socket-data-synchronization.md
index 0e8bb4b0f..0bf693e77 100644
--- a/docs/adr/0053-web-socket-data-synchronization.md
+++ b/docs/adr/0053-web-socket-data-synchronization.md
@@ -14,7 +14,6 @@ Accepted
 ## Decision
 
 - Web socket is implemented for real time update data for Twake Mail web
-- Service worker is implemented for background tasks, helping web socket working in background
 
 ## Consequences