diff --git a/zcash_client_backend/Cargo.toml b/zcash_client_backend/Cargo.toml
index f324fd332..3960e1429 100644
--- a/zcash_client_backend/Cargo.toml
+++ b/zcash_client_backend/Cargo.toml
@@ -20,7 +20,7 @@ ff = "0.8"
 group = "0.8"
 hex = "0.4"
 jubjub = "0.5.1"
-nom = "5.1.2"
+nom = "6.1"
 protobuf = "2.20"
 rand_core = "0.5.1"
 subtle = "2.2.3"
diff --git a/zcash_client_backend/src/zip321.rs b/zcash_client_backend/src/zip321.rs
index 4f914e0b0..0e1c32b9f 100644
--- a/zcash_client_backend/src/zip321.rs
+++ b/zcash_client_backend/src/zip321.rs
@@ -5,7 +5,8 @@ use std::fmt;
 use std::str::FromStr;
 
 use nom::{
-    character::complete::char, combinator::all_consuming, multi::separated_list, sequence::preceded,
+    character::complete::char, combinator::all_consuming, multi::separated_list0,
+    sequence::preceded,
 };
 use zcash_primitives::{consensus, transaction::components::Amount};
 
@@ -248,7 +249,7 @@ impl TransactionRequest {
         // Parse the remaining parameters as an undifferentiated list
         let (_, xs) = all_consuming(preceded(
             char('?'),
-            separated_list(char('&'), parse::zcashparam(params)),
+            separated_list0(char('&'), parse::zcashparam(params)),
         ))(rest)
         .map_err(|e| e.to_string())?;