diff --git a/requirements_dev.txt b/requirements_dev.txt
index c498a9b..ea86f13 100644
--- a/requirements_dev.txt
+++ b/requirements_dev.txt
@@ -8,7 +8,7 @@ cffi==1.14.0
 chardet==3.0.4
 colorama==0.4.4
 coverage==6.0.1
-cryptography==3.2
+cryptography==39.0.1
 docutils==0.16
 flake8==3.9.2
 idna==2.9