diff --git a/requirements.txt b/requirements.txt
index 56d7003..8e0d2f7 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -7,7 +7,7 @@ cffi==1.15.1
 chardet==5.0.0
 ciso8601==2.2.0
 coverage==6.4.1
-cryptography==3.4.8
+cryptography==42.0.0
 docopt==0.6.2
 docutils==0.18.1
 ephem==4.1.3