diff --git a/nkms/crypto/constants.py b/nkms/crypto/constants.py
index b21627871..3baca0382 100644
--- a/nkms/crypto/constants.py
+++ b/nkms/crypto/constants.py
@@ -1,5 +1,5 @@
 # TODO: Turn these into classes?
-HASH_DIGEST_LENGTH = 32
+HASH_DIGEST_LENGTH = 64
 
 NOT_SIGNED = 445
 NO_DECRYPTION_PERFORMED = 455