diff --git a/ethers-signers/Cargo.toml b/ethers-signers/Cargo.toml
index 05f465959..ec8e3ea67 100644
--- a/ethers-signers/Cargo.toml
+++ b/ethers-signers/Cargo.toml
@@ -56,11 +56,9 @@ coins-ledger = { version = "0.10.1", default-features = false, optional = true }
 semver = { workspace = true, optional = true }
 
 # trezor
-# TODO: bump this and remove protobuf pin
-trezor-client = { version = "=0.1.0", default-features = false, features = [
+trezor-client = { version = "=0.1.3", default-features = false, features = [
     "ethereum",
 ], optional = true }
-protobuf = { version = "=3.2.0", optional = true }
 
 # yubi
 yubihsm = { version = "0.42", features = ["secp256k1", "http", "usb"], optional = true }
@@ -81,6 +79,6 @@ celo = ["ethers-core/celo"]
 optimism = ["ethers-core/optimism"]
 
 ledger = ["coins-ledger", "futures", "semver"]
-trezor = ["trezor-client", "futures", "semver", "home", "protobuf"]
+trezor = ["trezor-client", "futures", "semver", "home"]
 aws = ["rusoto_core/rustls", "rusoto_kms/rustls", "spki"]
 yubi = ["yubihsm"]
diff --git a/ethers-signers/src/trezor/app.rs b/ethers-signers/src/trezor/app.rs
index e7a9d0adf..96559a187 100644
--- a/ethers-signers/src/trezor/app.rs
+++ b/ethers-signers/src/trezor/app.rs
@@ -167,7 +167,7 @@ impl TrezorEthereum {
 
         let transaction = TrezorTransaction::load(tx)?;
 
-        let chain_id = tx.chain_id().map(|id| id.as_u64()).unwrap_or(self.chain_id);
+        let chain_id = Some(tx.chain_id().map(|id| id.as_u64()).unwrap_or(self.chain_id));
 
         let signature = match tx {
             TypedTransaction::Eip2930(_) | TypedTransaction::Legacy(_) => client.ethereum_sign_tx(
@@ -194,11 +194,15 @@ impl TrezorEthereum {
             )?,
             #[cfg(feature = "optimism")]
             TypedTransaction::DepositTransaction(tx) => {
-                trezor_client::client::Signature { r: 0.into(), s: 0.into(), v: 0 }
+                trezor_client::client::Signature { r: [0; 32], s: [0; 32], v: 0 }
             }
         };
 
-        Ok(Signature { r: signature.r, s: signature.s, v: signature.v })
+        Ok(Signature {
+            r: U256::from_big_endian(&signature.r),
+            s: U256::from_big_endian(&signature.s),
+            v: signature.v,
+        })
     }
 
     /// Signs an ethereum personal message
@@ -209,7 +213,11 @@ impl TrezorEthereum {
 
         let signature = client.ethereum_sign_message(message.into(), apath)?;
 
-        Ok(Signature { r: signature.r, s: signature.s, v: signature.v })
+        Ok(Signature {
+            r: U256::from_big_endian(&signature.r),
+            s: U256::from_big_endian(&signature.s),
+            v: signature.v,
+        })
     }
 
     /// Signs an EIP712 encoded domain separator and message