diff --git a/src/trezor/messages/Address.py b/src/trezor/messages/Address.py
index c04a40a28c..fc361ab865 100644
--- a/src/trezor/messages/Address.py
+++ b/src/trezor/messages/Address.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class Address(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/ApplySettings.py b/src/trezor/messages/ApplySettings.py
index 4251038338..83a85e539d 100644
--- a/src/trezor/messages/ApplySettings.py
+++ b/src/trezor/messages/ApplySettings.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class ApplySettings(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/ButtonAck.py b/src/trezor/messages/ButtonAck.py
index c23d363f85..f09c192e54 100644
--- a/src/trezor/messages/ButtonAck.py
+++ b/src/trezor/messages/ButtonAck.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class ButtonAck(p.MessageType):
     MESSAGE_WIRE_TYPE = 27
diff --git a/src/trezor/messages/ButtonRequest.py b/src/trezor/messages/ButtonRequest.py
index f3f0c0157a..07a1ebc3e3 100644
--- a/src/trezor/messages/ButtonRequest.py
+++ b/src/trezor/messages/ButtonRequest.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class ButtonRequest(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/Cancel.py b/src/trezor/messages/Cancel.py
index 1effb5d5fa..bf2aa32e08 100644
--- a/src/trezor/messages/Cancel.py
+++ b/src/trezor/messages/Cancel.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class Cancel(p.MessageType):
     MESSAGE_WIRE_TYPE = 20
diff --git a/src/trezor/messages/ChangePin.py b/src/trezor/messages/ChangePin.py
index d4f1162b95..fd6e37795d 100644
--- a/src/trezor/messages/ChangePin.py
+++ b/src/trezor/messages/ChangePin.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class ChangePin(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/CipherKeyValue.py b/src/trezor/messages/CipherKeyValue.py
index 24cf26be42..58fa5debb8 100644
--- a/src/trezor/messages/CipherKeyValue.py
+++ b/src/trezor/messages/CipherKeyValue.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class CipherKeyValue(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/CipheredKeyValue.py b/src/trezor/messages/CipheredKeyValue.py
index 86fc46d975..b4dfeeb781 100644
--- a/src/trezor/messages/CipheredKeyValue.py
+++ b/src/trezor/messages/CipheredKeyValue.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class CipheredKeyValue(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/ClearSession.py b/src/trezor/messages/ClearSession.py
index a80d802d87..84fa334589 100644
--- a/src/trezor/messages/ClearSession.py
+++ b/src/trezor/messages/ClearSession.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class ClearSession(p.MessageType):
     MESSAGE_WIRE_TYPE = 24
diff --git a/src/trezor/messages/CoinType.py b/src/trezor/messages/CoinType.py
index 40d7aaf195..c4d192cecd 100644
--- a/src/trezor/messages/CoinType.py
+++ b/src/trezor/messages/CoinType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class CoinType(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/DebugLinkDecision.py b/src/trezor/messages/DebugLinkDecision.py
index 2c4ebc3d08..e57d513a3e 100644
--- a/src/trezor/messages/DebugLinkDecision.py
+++ b/src/trezor/messages/DebugLinkDecision.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DebugLinkDecision(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/DebugLinkFlashErase.py b/src/trezor/messages/DebugLinkFlashErase.py
index 6751cc043a..f66d051836 100644
--- a/src/trezor/messages/DebugLinkFlashErase.py
+++ b/src/trezor/messages/DebugLinkFlashErase.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DebugLinkFlashErase(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/DebugLinkGetState.py b/src/trezor/messages/DebugLinkGetState.py
index 26615584f5..007e3a8ccd 100644
--- a/src/trezor/messages/DebugLinkGetState.py
+++ b/src/trezor/messages/DebugLinkGetState.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DebugLinkGetState(p.MessageType):
     MESSAGE_WIRE_TYPE = 101
diff --git a/src/trezor/messages/DebugLinkLog.py b/src/trezor/messages/DebugLinkLog.py
index 0b4707b2ad..3740807088 100644
--- a/src/trezor/messages/DebugLinkLog.py
+++ b/src/trezor/messages/DebugLinkLog.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DebugLinkLog(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/DebugLinkMemory.py b/src/trezor/messages/DebugLinkMemory.py
index fd2227c675..1f6efabcf7 100644
--- a/src/trezor/messages/DebugLinkMemory.py
+++ b/src/trezor/messages/DebugLinkMemory.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DebugLinkMemory(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/DebugLinkMemoryRead.py b/src/trezor/messages/DebugLinkMemoryRead.py
index 25954e421f..39179a1b09 100644
--- a/src/trezor/messages/DebugLinkMemoryRead.py
+++ b/src/trezor/messages/DebugLinkMemoryRead.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DebugLinkMemoryRead(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/DebugLinkMemoryWrite.py b/src/trezor/messages/DebugLinkMemoryWrite.py
index d3b6822ae9..c53de2a598 100644
--- a/src/trezor/messages/DebugLinkMemoryWrite.py
+++ b/src/trezor/messages/DebugLinkMemoryWrite.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DebugLinkMemoryWrite(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/DebugLinkState.py b/src/trezor/messages/DebugLinkState.py
index 16ed8d1ba0..8adf128bf7 100644
--- a/src/trezor/messages/DebugLinkState.py
+++ b/src/trezor/messages/DebugLinkState.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .HDNodeType import HDNodeType
 
 class DebugLinkState(p.MessageType):
diff --git a/src/trezor/messages/DebugLinkStop.py b/src/trezor/messages/DebugLinkStop.py
index 4b409c2611..92e37c82d8 100644
--- a/src/trezor/messages/DebugLinkStop.py
+++ b/src/trezor/messages/DebugLinkStop.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DebugLinkStop(p.MessageType):
     MESSAGE_WIRE_TYPE = 103
diff --git a/src/trezor/messages/DecryptMessage.py b/src/trezor/messages/DecryptMessage.py
index 31df8c384f..5ef7baf1c5 100644
--- a/src/trezor/messages/DecryptMessage.py
+++ b/src/trezor/messages/DecryptMessage.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DecryptMessage(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/DecryptedMessage.py b/src/trezor/messages/DecryptedMessage.py
index 4a9d035687..cdc5823104 100644
--- a/src/trezor/messages/DecryptedMessage.py
+++ b/src/trezor/messages/DecryptedMessage.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class DecryptedMessage(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/ECDHSessionKey.py b/src/trezor/messages/ECDHSessionKey.py
index 18eac7493e..61af6e4986 100644
--- a/src/trezor/messages/ECDHSessionKey.py
+++ b/src/trezor/messages/ECDHSessionKey.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class ECDHSessionKey(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/EncryptMessage.py b/src/trezor/messages/EncryptMessage.py
index 21e8c29249..3d8ea3ced5 100644
--- a/src/trezor/messages/EncryptMessage.py
+++ b/src/trezor/messages/EncryptMessage.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EncryptMessage(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/EncryptedMessage.py b/src/trezor/messages/EncryptedMessage.py
index 2b9a981472..c26c51df71 100644
--- a/src/trezor/messages/EncryptedMessage.py
+++ b/src/trezor/messages/EncryptedMessage.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EncryptedMessage(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/Entropy.py b/src/trezor/messages/Entropy.py
index 3cae777aee..b8cc4405c6 100644
--- a/src/trezor/messages/Entropy.py
+++ b/src/trezor/messages/Entropy.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class Entropy(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/EntropyAck.py b/src/trezor/messages/EntropyAck.py
index 3266be4880..1183271f30 100644
--- a/src/trezor/messages/EntropyAck.py
+++ b/src/trezor/messages/EntropyAck.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EntropyAck(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/EntropyRequest.py b/src/trezor/messages/EntropyRequest.py
index 42bf912086..3990dd7157 100644
--- a/src/trezor/messages/EntropyRequest.py
+++ b/src/trezor/messages/EntropyRequest.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EntropyRequest(p.MessageType):
     MESSAGE_WIRE_TYPE = 35
diff --git a/src/trezor/messages/EstimateTxSize.py b/src/trezor/messages/EstimateTxSize.py
index 8b19b1d77a..6cb000d25e 100644
--- a/src/trezor/messages/EstimateTxSize.py
+++ b/src/trezor/messages/EstimateTxSize.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EstimateTxSize(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/EthereumAddress.py b/src/trezor/messages/EthereumAddress.py
index 43238f40fe..7e8dc27bc3 100644
--- a/src/trezor/messages/EthereumAddress.py
+++ b/src/trezor/messages/EthereumAddress.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EthereumAddress(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/EthereumGetAddress.py b/src/trezor/messages/EthereumGetAddress.py
index 31a31788f3..c6c0e669d2 100644
--- a/src/trezor/messages/EthereumGetAddress.py
+++ b/src/trezor/messages/EthereumGetAddress.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EthereumGetAddress(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/EthereumSignTx.py b/src/trezor/messages/EthereumSignTx.py
index e154cf87d6..35f6b035af 100644
--- a/src/trezor/messages/EthereumSignTx.py
+++ b/src/trezor/messages/EthereumSignTx.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EthereumSignTx(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/EthereumTxAck.py b/src/trezor/messages/EthereumTxAck.py
index 559a59fbdd..5c9683d35f 100644
--- a/src/trezor/messages/EthereumTxAck.py
+++ b/src/trezor/messages/EthereumTxAck.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EthereumTxAck(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/EthereumTxRequest.py b/src/trezor/messages/EthereumTxRequest.py
index af861cfa88..7e07a95dee 100644
--- a/src/trezor/messages/EthereumTxRequest.py
+++ b/src/trezor/messages/EthereumTxRequest.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class EthereumTxRequest(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/Failure.py b/src/trezor/messages/Failure.py
index b285aa60d8..97e8d2a1fa 100644
--- a/src/trezor/messages/Failure.py
+++ b/src/trezor/messages/Failure.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class Failure(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/Features.py b/src/trezor/messages/Features.py
index af5ebbeffb..865166b05f 100644
--- a/src/trezor/messages/Features.py
+++ b/src/trezor/messages/Features.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .CoinType import CoinType
 
 class Features(p.MessageType):
diff --git a/src/trezor/messages/FirmwareErase.py b/src/trezor/messages/FirmwareErase.py
index 4ec469f5b6..903bc7c464 100644
--- a/src/trezor/messages/FirmwareErase.py
+++ b/src/trezor/messages/FirmwareErase.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class FirmwareErase(p.MessageType):
     MESSAGE_WIRE_TYPE = 6
diff --git a/src/trezor/messages/FirmwareUpload.py b/src/trezor/messages/FirmwareUpload.py
index 2e53a2f367..8dec297631 100644
--- a/src/trezor/messages/FirmwareUpload.py
+++ b/src/trezor/messages/FirmwareUpload.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class FirmwareUpload(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/GetAddress.py b/src/trezor/messages/GetAddress.py
index 764ab28213..b94f0da592 100644
--- a/src/trezor/messages/GetAddress.py
+++ b/src/trezor/messages/GetAddress.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .MultisigRedeemScriptType import MultisigRedeemScriptType
 
 class GetAddress(p.MessageType):
diff --git a/src/trezor/messages/GetECDHSessionKey.py b/src/trezor/messages/GetECDHSessionKey.py
index 2a7f7a1306..650b667785 100644
--- a/src/trezor/messages/GetECDHSessionKey.py
+++ b/src/trezor/messages/GetECDHSessionKey.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .IdentityType import IdentityType
 
 class GetECDHSessionKey(p.MessageType):
diff --git a/src/trezor/messages/GetEntropy.py b/src/trezor/messages/GetEntropy.py
index 78417e4a8f..aa5634f8fa 100644
--- a/src/trezor/messages/GetEntropy.py
+++ b/src/trezor/messages/GetEntropy.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class GetEntropy(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/GetFeatures.py b/src/trezor/messages/GetFeatures.py
index 8fab4f1214..d351cc6b17 100644
--- a/src/trezor/messages/GetFeatures.py
+++ b/src/trezor/messages/GetFeatures.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class GetFeatures(p.MessageType):
     MESSAGE_WIRE_TYPE = 55
diff --git a/src/trezor/messages/GetPublicKey.py b/src/trezor/messages/GetPublicKey.py
index adc19545e4..5a2317cadb 100644
--- a/src/trezor/messages/GetPublicKey.py
+++ b/src/trezor/messages/GetPublicKey.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class GetPublicKey(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/HDNodePathType.py b/src/trezor/messages/HDNodePathType.py
index d022f0096c..fb835c640d 100644
--- a/src/trezor/messages/HDNodePathType.py
+++ b/src/trezor/messages/HDNodePathType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .HDNodeType import HDNodeType
 
 class HDNodePathType(p.MessageType):
diff --git a/src/trezor/messages/HDNodeType.py b/src/trezor/messages/HDNodeType.py
index 64e014756d..89fe224ccb 100644
--- a/src/trezor/messages/HDNodeType.py
+++ b/src/trezor/messages/HDNodeType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class HDNodeType(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/IdentityType.py b/src/trezor/messages/IdentityType.py
index a9b398e264..b628c29aaa 100644
--- a/src/trezor/messages/IdentityType.py
+++ b/src/trezor/messages/IdentityType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class IdentityType(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/Initialize.py b/src/trezor/messages/Initialize.py
index 6929682dcd..808c03c44b 100644
--- a/src/trezor/messages/Initialize.py
+++ b/src/trezor/messages/Initialize.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class Initialize(p.MessageType):
     MESSAGE_WIRE_TYPE = 0
diff --git a/src/trezor/messages/LoadDevice.py b/src/trezor/messages/LoadDevice.py
index 8be661ee04..ce0db777bd 100644
--- a/src/trezor/messages/LoadDevice.py
+++ b/src/trezor/messages/LoadDevice.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .HDNodeType import HDNodeType
 
 class LoadDevice(p.MessageType):
diff --git a/src/trezor/messages/MessageSignature.py b/src/trezor/messages/MessageSignature.py
index 86da938327..7dcd376e6a 100644
--- a/src/trezor/messages/MessageSignature.py
+++ b/src/trezor/messages/MessageSignature.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class MessageSignature(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/MultisigRedeemScriptType.py b/src/trezor/messages/MultisigRedeemScriptType.py
index e3fad435e0..fe56d291c5 100644
--- a/src/trezor/messages/MultisigRedeemScriptType.py
+++ b/src/trezor/messages/MultisigRedeemScriptType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .HDNodePathType import HDNodePathType
 
 class MultisigRedeemScriptType(p.MessageType):
diff --git a/src/trezor/messages/PassphraseAck.py b/src/trezor/messages/PassphraseAck.py
index 3f39ab574f..759a21cca0 100644
--- a/src/trezor/messages/PassphraseAck.py
+++ b/src/trezor/messages/PassphraseAck.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class PassphraseAck(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/PassphraseRequest.py b/src/trezor/messages/PassphraseRequest.py
index bfbb13b6ff..e973e24710 100644
--- a/src/trezor/messages/PassphraseRequest.py
+++ b/src/trezor/messages/PassphraseRequest.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class PassphraseRequest(p.MessageType):
     MESSAGE_WIRE_TYPE = 41
diff --git a/src/trezor/messages/PinMatrixAck.py b/src/trezor/messages/PinMatrixAck.py
index 2a79611118..8032777a78 100644
--- a/src/trezor/messages/PinMatrixAck.py
+++ b/src/trezor/messages/PinMatrixAck.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class PinMatrixAck(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/PinMatrixRequest.py b/src/trezor/messages/PinMatrixRequest.py
index 7b87504c9d..58f7b8031c 100644
--- a/src/trezor/messages/PinMatrixRequest.py
+++ b/src/trezor/messages/PinMatrixRequest.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class PinMatrixRequest(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/Ping.py b/src/trezor/messages/Ping.py
index 26c2fd8eab..883723217a 100644
--- a/src/trezor/messages/Ping.py
+++ b/src/trezor/messages/Ping.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class Ping(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/PublicKey.py b/src/trezor/messages/PublicKey.py
index 448463eca9..4b91d6cf95 100644
--- a/src/trezor/messages/PublicKey.py
+++ b/src/trezor/messages/PublicKey.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .HDNodeType import HDNodeType
 
 class PublicKey(p.MessageType):
diff --git a/src/trezor/messages/RecoveryDevice.py b/src/trezor/messages/RecoveryDevice.py
index a46e645312..a39501e744 100644
--- a/src/trezor/messages/RecoveryDevice.py
+++ b/src/trezor/messages/RecoveryDevice.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class RecoveryDevice(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/ResetDevice.py b/src/trezor/messages/ResetDevice.py
index 73935487bc..04c8467bbc 100644
--- a/src/trezor/messages/ResetDevice.py
+++ b/src/trezor/messages/ResetDevice.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class ResetDevice(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/SetU2FCounter.py b/src/trezor/messages/SetU2FCounter.py
index 993acb14b8..cb5e0392a8 100644
--- a/src/trezor/messages/SetU2FCounter.py
+++ b/src/trezor/messages/SetU2FCounter.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class SetU2FCounter(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/SignIdentity.py b/src/trezor/messages/SignIdentity.py
index 16a73adf21..55b01b95ae 100644
--- a/src/trezor/messages/SignIdentity.py
+++ b/src/trezor/messages/SignIdentity.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .IdentityType import IdentityType
 
 class SignIdentity(p.MessageType):
diff --git a/src/trezor/messages/SignMessage.py b/src/trezor/messages/SignMessage.py
index b2db7357f8..17a1e86a3a 100644
--- a/src/trezor/messages/SignMessage.py
+++ b/src/trezor/messages/SignMessage.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class SignMessage(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/SignTx.py b/src/trezor/messages/SignTx.py
index 2b6c7a339d..870865cc09 100644
--- a/src/trezor/messages/SignTx.py
+++ b/src/trezor/messages/SignTx.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class SignTx(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/SignedIdentity.py b/src/trezor/messages/SignedIdentity.py
index d5806a1b5b..724024273f 100644
--- a/src/trezor/messages/SignedIdentity.py
+++ b/src/trezor/messages/SignedIdentity.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class SignedIdentity(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/SimpleSignTx.py b/src/trezor/messages/SimpleSignTx.py
index 65caf70c59..d56d5f8d7a 100644
--- a/src/trezor/messages/SimpleSignTx.py
+++ b/src/trezor/messages/SimpleSignTx.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .TxInputType import TxInputType
 from .TxOutputType import TxOutputType
 from .TransactionType import TransactionType
diff --git a/src/trezor/messages/Storage.py b/src/trezor/messages/Storage.py
index a577b57f8b..e934d7531d 100644
--- a/src/trezor/messages/Storage.py
+++ b/src/trezor/messages/Storage.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .HDNodeType import HDNodeType
 
 class Storage(p.MessageType):
diff --git a/src/trezor/messages/Success.py b/src/trezor/messages/Success.py
index c39d80ad2b..5826b55d02 100644
--- a/src/trezor/messages/Success.py
+++ b/src/trezor/messages/Success.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class Success(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/TransactionType.py b/src/trezor/messages/TransactionType.py
index 2ae18c7ed3..f51f80bc02 100644
--- a/src/trezor/messages/TransactionType.py
+++ b/src/trezor/messages/TransactionType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .TxInputType import TxInputType
 from .TxOutputBinType import TxOutputBinType
 from .TxOutputType import TxOutputType
diff --git a/src/trezor/messages/TxAck.py b/src/trezor/messages/TxAck.py
index 83d418a26a..5e53e76454 100644
--- a/src/trezor/messages/TxAck.py
+++ b/src/trezor/messages/TxAck.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .TransactionType import TransactionType
 
 class TxAck(p.MessageType):
diff --git a/src/trezor/messages/TxInputType.py b/src/trezor/messages/TxInputType.py
index 4038ef67d4..6611608bc5 100644
--- a/src/trezor/messages/TxInputType.py
+++ b/src/trezor/messages/TxInputType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .MultisigRedeemScriptType import MultisigRedeemScriptType
 
 class TxInputType(p.MessageType):
diff --git a/src/trezor/messages/TxOutputBinType.py b/src/trezor/messages/TxOutputBinType.py
index 3f7830ecf1..4e47f71af6 100644
--- a/src/trezor/messages/TxOutputBinType.py
+++ b/src/trezor/messages/TxOutputBinType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class TxOutputBinType(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/TxOutputType.py b/src/trezor/messages/TxOutputType.py
index 05394fdb63..26f657bb80 100644
--- a/src/trezor/messages/TxOutputType.py
+++ b/src/trezor/messages/TxOutputType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .MultisigRedeemScriptType import MultisigRedeemScriptType
 
 class TxOutputType(p.MessageType):
diff --git a/src/trezor/messages/TxRequest.py b/src/trezor/messages/TxRequest.py
index 60e202409f..a93fd50016 100644
--- a/src/trezor/messages/TxRequest.py
+++ b/src/trezor/messages/TxRequest.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 from .TxRequestDetailsType import TxRequestDetailsType
 from .TxRequestSerializedType import TxRequestSerializedType
 
diff --git a/src/trezor/messages/TxRequestDetailsType.py b/src/trezor/messages/TxRequestDetailsType.py
index 7aad5880c6..5917ae17b9 100644
--- a/src/trezor/messages/TxRequestDetailsType.py
+++ b/src/trezor/messages/TxRequestDetailsType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class TxRequestDetailsType(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/TxRequestSerializedType.py b/src/trezor/messages/TxRequestSerializedType.py
index 5a700438ef..3fb534511a 100644
--- a/src/trezor/messages/TxRequestSerializedType.py
+++ b/src/trezor/messages/TxRequestSerializedType.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class TxRequestSerializedType(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/TxSize.py b/src/trezor/messages/TxSize.py
index de9583e371..5049fbde40 100644
--- a/src/trezor/messages/TxSize.py
+++ b/src/trezor/messages/TxSize.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class TxSize(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/VerifyMessage.py b/src/trezor/messages/VerifyMessage.py
index 90e3e64049..da3689e127 100644
--- a/src/trezor/messages/VerifyMessage.py
+++ b/src/trezor/messages/VerifyMessage.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class VerifyMessage(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/WipeDevice.py b/src/trezor/messages/WipeDevice.py
index 36f1974603..c267caa4d4 100644
--- a/src/trezor/messages/WipeDevice.py
+++ b/src/trezor/messages/WipeDevice.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class WipeDevice(p.MessageType):
     MESSAGE_WIRE_TYPE = 5
diff --git a/src/trezor/messages/WordAck.py b/src/trezor/messages/WordAck.py
index cf9ab65a2e..89271b7480 100644
--- a/src/trezor/messages/WordAck.py
+++ b/src/trezor/messages/WordAck.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class WordAck(p.MessageType):
     FIELDS = {
diff --git a/src/trezor/messages/WordRequest.py b/src/trezor/messages/WordRequest.py
index 8ca75a7e24..25d88bb128 100644
--- a/src/trezor/messages/WordRequest.py
+++ b/src/trezor/messages/WordRequest.py
@@ -1,6 +1,5 @@
 # Automatically generated by pb2py
 import protobuf as p
-from micropython import const
 
 class WordRequest(p.MessageType):
     MESSAGE_WIRE_TYPE = 46
diff --git a/src/trezor/messages/wire_types.py b/src/trezor/messages/wire_types.py
index f2952d641e..b8baec2b05 100644
--- a/src/trezor/messages/wire_types.py
+++ b/src/trezor/messages/wire_types.py
@@ -1,66 +1,66 @@
-WordRequest = const(46)
-DebugLinkMemoryWrite = const(112)
-ButtonAck = const(27)
-MessageSignature = const(40)
-EthereumAddress = const(57)
-EthereumTxAck = const(60)
-Ping = const(1)
-EncryptedMessage = const(50)
-DebugLinkStop = const(103)
-EstimateTxSize = const(43)
-GetPublicKey = const(11)
-GetFeatures = const(55)
-GetECDHSessionKey = const(61)
-PinMatrixRequest = const(18)
-ClearSession = const(24)
-LoadDevice = const(13)
-VerifyMessage = const(39)
-EthereumSignTx = const(58)
-PassphraseRequest = const(41)
-TxAck = const(22)
-ChangePin = const(4)
-DebugLinkLog = const(104)
-FirmwareErase = const(6)
-TxRequest = const(21)
-EthereumGetAddress = const(56)
-DebugLinkState = const(102)
-EthereumTxRequest = const(59)
-FirmwareUpload = const(7)
-SignedIdentity = const(54)
-Failure = const(3)
-EntropyRequest = const(35)
-ApplySettings = const(25)
-DebugLinkFlashErase = const(113)
-Address = const(30)
-Initialize = const(0)
-PinMatrixAck = const(19)
-SetU2FCounter = const(63)
-SignTx = const(15)
-DebugLinkGetState = const(101)
-Success = const(2)
-ResetDevice = const(14)
-WordAck = const(47)
-SimpleSignTx = const(16)
-GetAddress = const(29)
-TxSize = const(44)
-PassphraseAck = const(42)
-SignMessage = const(38)
-DecryptedMessage = const(52)
-DecryptMessage = const(51)
-GetEntropy = const(9)
-EntropyAck = const(36)
-WipeDevice = const(5)
-CipherKeyValue = const(23)
-Features = const(17)
-RecoveryDevice = const(45)
-SignIdentity = const(53)
-DebugLinkDecision = const(100)
-CipheredKeyValue = const(48)
-ButtonRequest = const(26)
-PublicKey = const(12)
-DebugLinkMemory = const(111)
-Entropy = const(10)
-Cancel = const(20)
-DebugLinkMemoryRead = const(110)
-EncryptMessage = const(49)
-ECDHSessionKey = const(62)
+WordRequest = 46
+DebugLinkMemoryWrite = 112
+ButtonAck = 27
+MessageSignature = 40
+EthereumAddress = 57
+EthereumTxAck = 60
+Ping = 1
+EncryptedMessage = 50
+DebugLinkStop = 103
+EstimateTxSize = 43
+GetPublicKey = 11
+GetFeatures = 55
+GetECDHSessionKey = 61
+PinMatrixRequest = 18
+ClearSession = 24
+LoadDevice = 13
+VerifyMessage = 39
+EthereumSignTx = 58
+PassphraseRequest = 41
+TxAck = 22
+ChangePin = 4
+DebugLinkLog = 104
+FirmwareErase = 6
+TxRequest = 21
+EthereumGetAddress = 56
+DebugLinkState = 102
+EthereumTxRequest = 59
+FirmwareUpload = 7
+SignedIdentity = 54
+Failure = 3
+EntropyRequest = 35
+ApplySettings = 25
+DebugLinkFlashErase = 113
+Address = 30
+Initialize = 0
+PinMatrixAck = 19
+SetU2FCounter = 63
+SignTx = 15
+DebugLinkGetState = 101
+Success = 2
+ResetDevice = 14
+WordAck = 47
+SimpleSignTx = 16
+GetAddress = 29
+TxSize = 44
+PassphraseAck = 42
+SignMessage = 38
+DecryptedMessage = 52
+DecryptMessage = 51
+GetEntropy = 9
+EntropyAck = 36
+WipeDevice = 5
+CipherKeyValue = 23
+Features = 17
+RecoveryDevice = 45
+SignIdentity = 53
+DebugLinkDecision = 100
+CipheredKeyValue = 48
+ButtonRequest = 26
+PublicKey = 12
+DebugLinkMemory = 111
+Entropy = 10
+Cancel = 20
+DebugLinkMemoryRead = 110
+EncryptMessage = 49
+ECDHSessionKey = 62
diff --git a/tools/pb2py b/tools/pb2py
index e999fb2aa1..c5435a482f 100755
--- a/tools/pb2py
+++ b/tools/pb2py
@@ -9,7 +9,7 @@ from google.protobuf.internal.enum_type_wrapper import EnumTypeWrapper
 def process_type(t, cls, msg_id, indexfile):
     print("  * type %s" % t)
 
-    imports = ["import protobuf as p", "from micropython import const", ]
+    imports = ["import protobuf as p", ]
 
     out = ["", "class %s(p.MessageType):" % t, ]
 
@@ -85,7 +85,7 @@ def process_type(t, cls, msg_id, indexfile):
     if msg_id is not None:
         out.append("    MESSAGE_WIRE_TYPE = %d" % msg_id)
         if indexfile is not None:
-            indexfile.write("%s = const(%d)\n" % (t, msg_id))
+            indexfile.write("%s = %d\n" % (t, msg_id))
 
     return imports + out