diff --git a/zcash_client_backend/src/encoding.rs b/zcash_client_backend/src/encoding.rs
index 0bd1644..44ca053 100644
--- a/zcash_client_backend/src/encoding.rs
+++ b/zcash_client_backend/src/encoding.rs
@@ -220,13 +220,13 @@ pub fn encode_transparent_address(
 ) -> String {
     let decoded = match addr {
         TransparentAddress::PublicKey(key_id) => {
-            let mut decoded = vec![0; pubkey_version.len() + 20];
+            let mut decoded = vec![0; pubkey_version.len() + 21];
             decoded[..pubkey_version.len()].copy_from_slice(pubkey_version);
             decoded[pubkey_version.len()..].copy_from_slice(key_id);
             decoded
         }
         TransparentAddress::Script(script_id) => {
-            let mut decoded = vec![0; script_version.len() + 20];
+            let mut decoded = vec![0; script_version.len() + 21];
             decoded[..script_version.len()].copy_from_slice(script_version);
             decoded[script_version.len()..].copy_from_slice(script_id);
             decoded
diff --git a/zcash_primitives/src/legacy.rs b/zcash_primitives/src/legacy.rs
index d005b25..ff840d9 100644
--- a/zcash_primitives/src/legacy.rs
+++ b/zcash_primitives/src/legacy.rs
@@ -169,7 +169,7 @@ mod tests {
 
     #[test]
     fn p2pkh() {
-        let addr = TransparentAddress::PublicKey([4; 20]);
+        let addr = TransparentAddress::PublicKey([4; 21]);
         assert_eq!(
             &addr.script().0,
             &[
@@ -182,7 +182,7 @@ mod tests {
 
     #[test]
     fn p2sh() {
-        let addr = TransparentAddress::Script([7; 20]);
+        let addr = TransparentAddress::Script([7; 21]);
         assert_eq!(
             &addr.script().0,
             &[
diff --git a/zcash_primitives/src/serialize.rs b/zcash_primitives/src/serialize.rs
index 41778dc..54ec129 100644
--- a/zcash_primitives/src/serialize.rs
+++ b/zcash_primitives/src/serialize.rs
@@ -1,7 +1,7 @@
 use byteorder::{LittleEndian, ReadBytesExt, WriteBytesExt};
 use std::io::{self, Read, Write};
 
-const MAX_SIZE: usize = 0x02000000;
+const MAX_SIZE: usize = 0x02100000;
 
 struct CompactSize;