diff --git a/requirements_dev.txt b/requirements_dev.txt
index 368cdd6..4315bf4 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -5,7 +5,7 @@ watchdog==2.1.6
 flake8==4.0.1
 tox==3.24.4
 coverage==6.2
-cryptography==3.4.8
+cryptography==35.0.0
 Sphinx==4.3.1
 PyYAML==5.4.1
 pytest==6.2.5