diff --git a/note-backend/requirements.txt b/note-backend/requirements.txt
index d4cefb3..3698159 100644
--- a/note-backend/requirements.txt
+++ b/note-backend/requirements.txt
@@ -16,5 +16,5 @@ starlette==0.13.2
 uvicorn==0.11.5
 virtualenv==16.3.0
 virtualenvwrapper-win==1.2.5
-websockets==8.1
+websockets==9.1
 win32-setctime==1.0.1