diff --git a/requirements.txt b/requirements.txt
index f6334f8..5485b8e 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -11,7 +11,7 @@ certifi==2020.6.20
 cffi==1.14.0
 chardet==3.0.4
 click==6.6
-cryptography==2.3
+cryptography==39.0.1
 dominate==2.2.1
 ecdsa==0.13.3
 enum34==1.1.6