diff --git a/requirements.txt b/requirements.txt
index 8b57363..2d9c0b2 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -17,7 +17,7 @@ redis>=8.1.0
 # --- [Security & Auth] ---
 bcrypt==4.0.1  # pinned: passlib 1.7.4 breaks on bcrypt>=4.1 (72-byte length check regression)
 passlib[bcrypt]>=1.7.4
-cryptography>=42.0.0
+cryptography>=50.0.1
 
 # --- [Data Analysis & Math] ---
 numpy>=1.23.0,<3.0.0