diff --git a/requirements.txt b/requirements.txt
index f6e850d..428cffb 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,6 +1,6 @@
 aniso8601==1.2.0
 Flask==1.1.1
-cryptography==2.1.4
+cryptography==3.3.2
 pyOpenSSL==17.0.0
 PyYAML==5.4
 six==1.11.0