diff --git a/backend/CHAT_SERVER/requirements.txt b/backend/CHAT_SERVER/requirements.txt
index a91a7c3..7137935 100644
--- a/backend/CHAT_SERVER/requirements.txt
+++ b/backend/CHAT_SERVER/requirements.txt
@@ -10,7 +10,7 @@ cffi==1.13.2
 channels==2.4.0
 channels-redis==2.4.1
 constantly==15.1.0
-cryptography==2.8
+cryptography==3.2
 daphne==2.4.1
 decorator==4.4.1
 Django==3.0.3