diff --git a/requirements/dev.txt b/requirements/dev.txt
index 182a70a..bd9f765 100644
--- a/requirements/dev.txt
+++ b/requirements/dev.txt
@@ -8,5 +8,5 @@ flake8==3.5.0
 tox==2.9.1
 coverage==4.5.1
 Sphinx==1.7.0
-cryptography==2.1.4
+cryptography==42.0.7
 PyYAML==3.12