diff --git a/examples/reservations-bot-demo/cloud_function/requirements.txt b/examples/reservations-bot-demo/cloud_function/requirements.txt
index 3c863b08..a7f87695 100644
--- a/examples/reservations-bot-demo/cloud_function/requirements.txt
+++ b/examples/reservations-bot-demo/cloud_function/requirements.txt
@@ -1,7 +1,7 @@
 certifi==2020.6.20
 cffi==1.14.2
 chardet==3.0.4
-cryptography==41.0.0
+cryptography==43.0.1
 enum-compat==0.0.3
 googleapis-common-protos==1.52.0
 grpcio==1.53.2