diff --git a/requirements_dev.txt b/requirements_dev.txt
index ce75ebf..ab92fc7 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==2.1.9
 flake8==5.0.4
 tox==3.26.0
 coverage==7.2.2
-cryptography==38.0.2
+cryptography==40.0.1
 Sphinx==5.3.0
 PyYAML==6.0
 pytest==7.1.3