diff --git a/src/trezor/messages/CipherKeyValue.py b/src/trezor/messages/CipherKeyValue.py
index 25d7f050..ee471f1d 100644
--- a/src/trezor/messages/CipherKeyValue.py
+++ b/src/trezor/messages/CipherKeyValue.py
@@ -16,7 +16,7 @@ class CipherKeyValue(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         key: str = None,
         value: bytes = None,
         encrypt: bool = None,
@@ -25,7 +25,7 @@ class CipherKeyValue(p.MessageType):
         iv: bytes = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.key = key
         self.value = value
         self.encrypt = encrypt
diff --git a/src/trezor/messages/CosiCommit.py b/src/trezor/messages/CosiCommit.py
index a39c8cfc..83c42720 100644
--- a/src/trezor/messages/CosiCommit.py
+++ b/src/trezor/messages/CosiCommit.py
@@ -11,10 +11,10 @@ class CosiCommit(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         data: bytes = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.data = data
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/CosiSign.py b/src/trezor/messages/CosiSign.py
index d79596c3..681ba896 100644
--- a/src/trezor/messages/CosiSign.py
+++ b/src/trezor/messages/CosiSign.py
@@ -13,13 +13,13 @@ class CosiSign(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         data: bytes = None,
         global_commitment: bytes = None,
         global_pubkey: bytes = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.data = data
         self.global_commitment = global_commitment
         self.global_pubkey = global_pubkey
diff --git a/src/trezor/messages/DecryptMessage.py b/src/trezor/messages/DecryptMessage.py
index 3636ab98..b995e5b0 100644
--- a/src/trezor/messages/DecryptMessage.py
+++ b/src/trezor/messages/DecryptMessage.py
@@ -13,13 +13,13 @@ class DecryptMessage(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         nonce: bytes = None,
         message: bytes = None,
         hmac: bytes = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.nonce = nonce
         self.message = message
         self.hmac = hmac
diff --git a/src/trezor/messages/EncryptMessage.py b/src/trezor/messages/EncryptMessage.py
index dcd51e91..4f07edb7 100644
--- a/src/trezor/messages/EncryptMessage.py
+++ b/src/trezor/messages/EncryptMessage.py
@@ -17,13 +17,13 @@ class EncryptMessage(p.MessageType):
         pubkey: bytes = None,
         message: bytes = None,
         display_only: bool = None,
-        address_n: list = [],
+        address_n: list = None,
         coin_name: str = None,
         **kwargs,
     ):
         self.pubkey = pubkey
         self.message = message
         self.display_only = display_only
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.coin_name = coin_name
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/EthereumGetAddress.py b/src/trezor/messages/EthereumGetAddress.py
index ce4030f8..a98a8e9f 100644
--- a/src/trezor/messages/EthereumGetAddress.py
+++ b/src/trezor/messages/EthereumGetAddress.py
@@ -11,10 +11,10 @@ class EthereumGetAddress(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         show_display: bool = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.show_display = show_display
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/EthereumSignMessage.py b/src/trezor/messages/EthereumSignMessage.py
index fe5eecf6..d741bf98 100644
--- a/src/trezor/messages/EthereumSignMessage.py
+++ b/src/trezor/messages/EthereumSignMessage.py
@@ -11,10 +11,10 @@ class EthereumSignMessage(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         message: bytes = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.message = message
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/EthereumSignTx.py b/src/trezor/messages/EthereumSignTx.py
index 97377e6b..452c83b1 100644
--- a/src/trezor/messages/EthereumSignTx.py
+++ b/src/trezor/messages/EthereumSignTx.py
@@ -18,7 +18,7 @@ class EthereumSignTx(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         nonce: bytes = None,
         gas_price: bytes = None,
         gas_limit: bytes = None,
@@ -29,7 +29,7 @@ class EthereumSignTx(p.MessageType):
         chain_id: int = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.nonce = nonce
         self.gas_price = gas_price
         self.gas_limit = gas_limit
diff --git a/src/trezor/messages/Features.py b/src/trezor/messages/Features.py
index 2057ca97..af5d4ade 100644
--- a/src/trezor/messages/Features.py
+++ b/src/trezor/messages/Features.py
@@ -47,7 +47,7 @@ class Features(p.MessageType):
         passphrase_protection: bool = None,
         language: str = None,
         label: str = None,
-        coins: list = [],
+        coins: list = None,
         initialized: bool = None,
         revision: bytes = None,
         bootloader_hash: bytes = None,
@@ -76,7 +76,7 @@ class Features(p.MessageType):
         self.passphrase_protection = passphrase_protection
         self.language = language
         self.label = label
-        self.coins = coins
+        self.coins = [] if coins is None else coins
         self.initialized = initialized
         self.revision = revision
         self.bootloader_hash = bootloader_hash
diff --git a/src/trezor/messages/GetAddress.py b/src/trezor/messages/GetAddress.py
index 528b4681..9870a391 100644
--- a/src/trezor/messages/GetAddress.py
+++ b/src/trezor/messages/GetAddress.py
@@ -15,14 +15,14 @@ class GetAddress(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         coin_name: str = None,
         show_display: bool = None,
         multisig: MultisigRedeemScriptType = None,
         script_type: int = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.coin_name = coin_name
         self.show_display = show_display
         self.multisig = multisig
diff --git a/src/trezor/messages/GetPublicKey.py b/src/trezor/messages/GetPublicKey.py
index a90021af..7d2f8fad 100644
--- a/src/trezor/messages/GetPublicKey.py
+++ b/src/trezor/messages/GetPublicKey.py
@@ -13,13 +13,13 @@ class GetPublicKey(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         ecdsa_curve_name: str = None,
         show_display: bool = None,
         coin_name: str = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.ecdsa_curve_name = ecdsa_curve_name
         self.show_display = show_display
         self.coin_name = coin_name
diff --git a/src/trezor/messages/HDNodePathType.py b/src/trezor/messages/HDNodePathType.py
index 49971d5e..41055d83 100644
--- a/src/trezor/messages/HDNodePathType.py
+++ b/src/trezor/messages/HDNodePathType.py
@@ -12,9 +12,9 @@ class HDNodePathType(p.MessageType):
     def __init__(
         self,
         node: HDNodeType = None,
-        address_n: list = [],
+        address_n: list = None,
         **kwargs,
     ):
         self.node = node
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/MultisigRedeemScriptType.py b/src/trezor/messages/MultisigRedeemScriptType.py
index eab03693..5ffd534e 100644
--- a/src/trezor/messages/MultisigRedeemScriptType.py
+++ b/src/trezor/messages/MultisigRedeemScriptType.py
@@ -12,12 +12,12 @@ class MultisigRedeemScriptType(p.MessageType):
 
     def __init__(
         self,
-        pubkeys: list = [],
-        signatures: list = [],
+        pubkeys: list = None,
+        signatures: list = None,
         m: int = None,
         **kwargs,
     ):
-        self.pubkeys = pubkeys
-        self.signatures = signatures
+        self.pubkeys = [] if pubkeys is None else pubkeys
+        self.signatures = [] if signatures is None else signatures
         self.m = m
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/NEMAggregateModification.py b/src/trezor/messages/NEMAggregateModification.py
index 6aaff97f..b2ad1d0e 100644
--- a/src/trezor/messages/NEMAggregateModification.py
+++ b/src/trezor/messages/NEMAggregateModification.py
@@ -11,10 +11,10 @@ class NEMAggregateModification(p.MessageType):
 
     def __init__(
         self,
-        modifications: list = [],
+        modifications: list = None,
         relative_change: int = None,
         **kwargs,
     ):
-        self.modifications = modifications
+        self.modifications = [] if modifications is None else modifications
         self.relative_change = relative_change
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/NEMDecryptMessage.py b/src/trezor/messages/NEMDecryptMessage.py
index 9ca8f339..e19cb2bf 100644
--- a/src/trezor/messages/NEMDecryptMessage.py
+++ b/src/trezor/messages/NEMDecryptMessage.py
@@ -13,13 +13,13 @@ class NEMDecryptMessage(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         network: int = None,
         public_key: bytes = None,
         payload: bytes = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.network = network
         self.public_key = public_key
         self.payload = payload
diff --git a/src/trezor/messages/NEMGetAddress.py b/src/trezor/messages/NEMGetAddress.py
index 612423a6..bd39bc06 100644
--- a/src/trezor/messages/NEMGetAddress.py
+++ b/src/trezor/messages/NEMGetAddress.py
@@ -12,12 +12,12 @@ class NEMGetAddress(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         network: int = None,
         show_display: bool = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.network = network
         self.show_display = show_display
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/NEMMosaicDefinition.py b/src/trezor/messages/NEMMosaicDefinition.py
index a02499e5..1fdb9c60 100644
--- a/src/trezor/messages/NEMMosaicDefinition.py
+++ b/src/trezor/messages/NEMMosaicDefinition.py
@@ -37,7 +37,7 @@ class NEMMosaicDefinition(p.MessageType):
         mutable_supply: bool = None,
         transferable: bool = None,
         description: str = None,
-        networks: list = [],
+        networks: list = None,
         **kwargs,
     ):
         self.name = name
@@ -54,5 +54,5 @@ class NEMMosaicDefinition(p.MessageType):
         self.mutable_supply = mutable_supply
         self.transferable = transferable
         self.description = description
-        self.networks = networks
+        self.networks = [] if networks is None else networks
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/NEMTransactionCommon.py b/src/trezor/messages/NEMTransactionCommon.py
index 1d6622ad..5357dbbd 100644
--- a/src/trezor/messages/NEMTransactionCommon.py
+++ b/src/trezor/messages/NEMTransactionCommon.py
@@ -14,7 +14,7 @@ class NEMTransactionCommon(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         network: int = None,
         timestamp: int = None,
         fee: int = None,
@@ -22,7 +22,7 @@ class NEMTransactionCommon(p.MessageType):
         signer: bytes = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.network = network
         self.timestamp = timestamp
         self.fee = fee
diff --git a/src/trezor/messages/NEMTransfer.py b/src/trezor/messages/NEMTransfer.py
index d019f9ae..53319165 100644
--- a/src/trezor/messages/NEMTransfer.py
+++ b/src/trezor/messages/NEMTransfer.py
@@ -18,12 +18,12 @@ class NEMTransfer(p.MessageType):
         amount: int = None,
         payload: bytes = None,
         public_key: bytes = None,
-        mosaics: list = [],
+        mosaics: list = None,
         **kwargs,
     ):
         self.recipient = recipient
         self.amount = amount
         self.payload = payload
         self.public_key = public_key
-        self.mosaics = mosaics
+        self.mosaics = [] if mosaics is None else mosaics
         p.MessageType.__init__(self, **kwargs)
diff --git a/src/trezor/messages/SignMessage.py b/src/trezor/messages/SignMessage.py
index 38569125..3f261424 100644
--- a/src/trezor/messages/SignMessage.py
+++ b/src/trezor/messages/SignMessage.py
@@ -13,13 +13,13 @@ class SignMessage(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         message: bytes = None,
         coin_name: str = None,
         script_type: int = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.message = message
         self.coin_name = coin_name
         self.script_type = script_type
diff --git a/src/trezor/messages/SimpleSignTx.py b/src/trezor/messages/SimpleSignTx.py
index 2bf7e6e3..27f0d7a0 100644
--- a/src/trezor/messages/SimpleSignTx.py
+++ b/src/trezor/messages/SimpleSignTx.py
@@ -18,17 +18,17 @@ class SimpleSignTx(p.MessageType):
 
     def __init__(
         self,
-        inputs: list = [],
-        outputs: list = [],
-        transactions: list = [],
+        inputs: list = None,
+        outputs: list = None,
+        transactions: list = None,
         coin_name: str = None,
         version: int = None,
         lock_time: int = None,
         **kwargs,
     ):
-        self.inputs = inputs
-        self.outputs = outputs
-        self.transactions = transactions
+        self.inputs = [] if inputs is None else inputs
+        self.outputs = [] if outputs is None else outputs
+        self.transactions = [] if transactions is None else transactions
         self.coin_name = coin_name
         self.version = version
         self.lock_time = lock_time
diff --git a/src/trezor/messages/TransactionType.py b/src/trezor/messages/TransactionType.py
index 655c42cf..d2e49f99 100644
--- a/src/trezor/messages/TransactionType.py
+++ b/src/trezor/messages/TransactionType.py
@@ -22,10 +22,10 @@ class TransactionType(p.MessageType):
     def __init__(
         self,
         version: int = None,
-        inputs: list = [],
-        bin_outputs: list = [],
+        inputs: list = None,
+        bin_outputs: list = None,
         lock_time: int = None,
-        outputs: list = [],
+        outputs: list = None,
         inputs_cnt: int = None,
         outputs_cnt: int = None,
         extra_data: bytes = None,
@@ -34,10 +34,10 @@ class TransactionType(p.MessageType):
         **kwargs,
     ):
         self.version = version
-        self.inputs = inputs
-        self.bin_outputs = bin_outputs
+        self.inputs = [] if inputs is None else inputs
+        self.bin_outputs = [] if bin_outputs is None else bin_outputs
         self.lock_time = lock_time
-        self.outputs = outputs
+        self.outputs = [] if outputs is None else outputs
         self.inputs_cnt = inputs_cnt
         self.outputs_cnt = outputs_cnt
         self.extra_data = extra_data
diff --git a/src/trezor/messages/TxInputType.py b/src/trezor/messages/TxInputType.py
index 4dae303d..53304d0a 100644
--- a/src/trezor/messages/TxInputType.py
+++ b/src/trezor/messages/TxInputType.py
@@ -19,7 +19,7 @@ class TxInputType(p.MessageType):
 
     def __init__(
         self,
-        address_n: list = [],
+        address_n: list = None,
         prev_hash: bytes = None,
         prev_index: int = None,
         script_sig: bytes = None,
@@ -31,7 +31,7 @@ class TxInputType(p.MessageType):
         decred_script_version: int = None,
         **kwargs,
     ):
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.prev_hash = prev_hash
         self.prev_index = prev_index
         self.script_sig = script_sig
diff --git a/src/trezor/messages/TxOutputType.py b/src/trezor/messages/TxOutputType.py
index f8e03a1f..716920fa 100644
--- a/src/trezor/messages/TxOutputType.py
+++ b/src/trezor/messages/TxOutputType.py
@@ -17,7 +17,7 @@ class TxOutputType(p.MessageType):
     def __init__(
         self,
         address: str = None,
-        address_n: list = [],
+        address_n: list = None,
         amount: int = None,
         script_type: int = None,
         multisig: MultisigRedeemScriptType = None,
@@ -26,7 +26,7 @@ class TxOutputType(p.MessageType):
         **kwargs,
     ):
         self.address = address
-        self.address_n = address_n
+        self.address_n = [] if address_n is None else address_n
         self.amount = amount
         self.script_type = script_type
         self.multisig = multisig