diff --git a/requirements.txt b/requirements.txt
index 0a93458..42e6c37 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -4,7 +4,7 @@ bcrypt==3.1.7
 blinker==1.4
 cffi==1.12.3
 Click==7.0
-cryptography==2.7
+cryptography==39.0.1
 Flask==1.1.1
 Flask-Login==0.4.1
 Flask-Mail==0.9.1