diff --git a/requirements.txt b/requirements.txt
index 243bad5..06490b5 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ certifi==2018.1.18
 cffi==1.11.4
 chardet==3.0.4
 click==6.7
-cryptography==2.3
+cryptography==39.0.1
 Flask==1.0.2
 Flask-Login==0.4.1
 Flask-Migrate==2.1.1