diff --git a/src/gam/auth/yubikey.py b/src/gam/auth/yubikey.py
index f6ea2ad5..6a8c5773 100644
--- a/src/gam/auth/yubikey.py
+++ b/src/gam/auth/yubikey.py
@@ -11,7 +11,7 @@ import ykman.descriptor
 # hack to avoid deprecation notice from cryptography
 # remove after this lands:
 # https://github.com/Yubico/yubikey-manager/pull/385
-sys.modules['ykman.utils.int_from_bytes'] = int.from_bytes
+sys.modules['cryptography.utils'].int_from_bytes = int.from_bytes
 
 from ykman.piv import SLOT, ALGO, PivController, DEFAULT_MANAGEMENT_KEY
 from ykman.util import TRANSPORT