diff --git a/requirements.txt b/requirements.txt
index 6c857e0..b63fe00 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 certifi==2019.11.28
 cffi==1.13.2
 chardet==3.0.4
-cryptography==2.8
+cryptography==39.0.1
 future==0.18.2
 idna==2.8
 numpy==1.18.0