diff --git a/c_chat_server/requirements.txt b/c_chat_server/requirements.txt
index 762c91d..c029d2b 100644
--- a/c_chat_server/requirements.txt
+++ b/c_chat_server/requirements.txt
@@ -30,7 +30,7 @@ urllib3==1.24.3
 Werkzeug==0.15.2
 WTForms==2.2.1
 flask-login
-celery==4.3.0
+celery==5.2.2
 pymongo==3.8.0
 pandas==0.24.2
 cryptography==2.7