diff --git a/requirements.txt b/requirements.txt
index 79f7d93..24259e9 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -1,7 +1,7 @@
 aioapns==1.9.1
 asyncio==3.4.3
 cffi==1.14.0
-cryptography==2.9.2
+cryptography==3.2
 h2==3.1.1
 hpack==3.0.0
 hyperframe==5.2.0