diff --git a/requirements.txt b/requirements.txt
index f093a27..4fa41f3 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -8,7 +8,7 @@ async-timeout==3.0.1
 attrs==19.1.0
 flagparse==0.0.3
 chardet==3.0.4
-cryptography==3.3.2
+cryptography==39.0.1
 gast==0.2.2
 google-pasta==0.1.7
 grpcio==1.21.1