diff --git a/setup.cfg b/setup.cfg
index 3f3e838ff..6b3bd5005 100644
--- a/setup.cfg
+++ b/setup.cfg
@@ -25,11 +25,10 @@ scripts =
   deploy/i2p
   deploy/onion
 install_requires =
-  crypto >= 1.4.1, < 2
   idna >= 2.5, < 3
   numpy >= 1.20.0, < 2
   pillow >= 8.1.0, < 9
-  cryptography
+  cryptography >= 3.3.1, < 4
   pyqrcode >= 1.2.1, < 2
   python-dateutil >= 2.8.1, < 3
   requests >= 2.25.1, < 3