diff --git a/Chapter16/requirements.txt b/Chapter16/requirements.txt
index ea198d9..5c3dfc1 100644
--- a/Chapter16/requirements.txt
+++ b/Chapter16/requirements.txt
@@ -4,4 +4,4 @@ pyyaml==5.3.1
 requests==2.25.1
 werkzeug==2.0.2
 SQLAlchemy==1.3.24
-cryptography==3.3.2
\ No newline at end of file
+cryptography==50.0.0
\ No newline at end of file