diff --git a/Chapter09/requirements.txt b/Chapter09/requirements.txt
index cf770dc..d2cc706 100644
--- a/Chapter09/requirements.txt
+++ b/Chapter09/requirements.txt
@@ -29,7 +29,7 @@ comm @ file:///home/conda/feedstock_root/build_artifacts/comm_1679481329611/work
 contourpy==1.0.7
 convertdate==2.4.0
 crashtest==0.4.1
-cryptography==40.0.2
+cryptography==41.0.0
 cycler==0.11.0
 Cython==0.29.33
 datasets==2.12.0