diff --git a/backend/requirements.txt b/backend/requirements.txt
index 90ad2d15..9a1a28de 100644
--- a/backend/requirements.txt
+++ b/backend/requirements.txt
@@ -3,7 +3,7 @@ argon2-cffi==23.1.0
 argon2-cffi-bindings==21.2.0
 Babel==2.15.0
 caldav==1.3.9
-cryptography==42.0.8
+cryptography==43.0.1
 fastapi==0.111.0
 fluent.runtime==0.4.0
 fluent.syntax==0.19.0