diff --git a/requirements.txt b/requirements.txt
index 3e7b6d65..2c639dd4 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -47,7 +47,7 @@ configobj==5.0.6
 configparser==3.5.0
 CoolProp==6.0.0
 coverage==4.1
-cryptography==1.4
+cryptography==42.0.0
 cssselect==0.9.2
 curtsies==0.2.6
 cvxopt==1.1.6