Update the crypto submodule
diff --git a/crypto b/crypto
index 89e7655..21db2a9 160000
--- a/crypto
+++ b/crypto
@@ -1 +1 @@
-Subproject commit 89e76556910c2704313fe23b174f2742702a3a29
+Subproject commit 21db2a94a482689e4e4f4e5473d4b5723c5394e4