diff --git a/Cargo.toml b/Cargo.toml
index a836993b..ea6e842d 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -50,6 +50,7 @@ plotters = { version = "0.3.0", optional = true }
 [dev-dependencies]
 criterion = "0.3"
 halo2_gadgets = { version = "=0.1.0-beta.3", features = ["test-dependencies"] }
+hex = "0.4"
 proptest = "1.0.0"
 zcash_note_encryption = { version = "0.1", features = ["pre-zip-212"] }
 
@@ -82,7 +83,7 @@ debug = true
 debug = true
 
 [patch.crates-io]
-halo2_gadgets = { git = "https://github.com/zcash/halo2.git", rev = "72ff677776504c288f4927a6ce8d3c273ebd588d" }
-halo2_proofs = { git = "https://github.com/zcash/halo2.git", rev = "72ff677776504c288f4927a6ce8d3c273ebd588d" }
+halo2_gadgets = { git = "https://github.com/zcash/halo2.git", rev = "30f92f3f4b785ea2a32392bf65c1b08f0411567c" }
+halo2_proofs = { git = "https://github.com/zcash/halo2.git", rev = "30f92f3f4b785ea2a32392bf65c1b08f0411567c" }
 incrementalmerkletree = { git = "https://github.com/zcash/incrementalmerkletree.git", rev = "f23e3d89507849a24543121839eea6f40b141aff" }
 reddsa = { git = "https://github.com/ZcashFoundation/reddsa.git", rev = "0e912de3000fe165daf58ad98d1a22f1a66e7f18" }