diff --git a/extmod/modtrezorprotobuf/modtrezorprotobuf.c b/extmod/modtrezorprotobuf/modtrezorprotobuf.c
deleted file mode 100644
index 69ba62e2a3..0000000000
--- a/extmod/modtrezorprotobuf/modtrezorprotobuf.c
+++ /dev/null
@@ -1,75 +0,0 @@
-/*
- * Copyright (c) Pavol Rusnak, SatoshiLabs
- *
- * Licensed under Microsoft Reference Source License (Ms-RSL)
- * see LICENSE.md file for details
- */
-
-#include <stdio.h>
-#include <string.h>
-#include <stdint.h>
-
-#include "py/nlr.h"
-#include "py/runtime.h"
-#include "py/binary.h"
-
-#if MICROPY_PY_TREZORPROTOBUF
-
-// class Protobuf(object):
-typedef struct _mp_obj_Protobuf_t {
-    mp_obj_base_t base;
-} mp_obj_Protobuf_t;
-
-// def Protobuf.__init__(self)
-STATIC mp_obj_t mod_TrezorProtobuf_Protobuf_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
-    mp_arg_check_num(n_args, n_kw, 0, 0, false);
-    mp_obj_Protobuf_t *o = m_new_obj(mp_obj_Protobuf_t);
-    o->base.type = type;
-    return MP_OBJ_FROM_PTR(o);
-}
-
-// def Protobuf.encode(self, message) -> bytes
-STATIC mp_obj_t mod_TrezorProtobuf_Protobuf_encode(mp_obj_t self, mp_obj_t callback) {
-    // TODO
-    return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorProtobuf_Protobuf_encode_obj, mod_TrezorProtobuf_Protobuf_encode);
-
-// def Protobuf.decode(self, data: bytes) -> object
-STATIC mp_obj_t mod_TrezorProtobuf_Protobuf_decode(mp_obj_t self, mp_obj_t data) {
-    // TODO
-    return mp_const_none;
-}
-STATIC MP_DEFINE_CONST_FUN_OBJ_2(mod_TrezorProtobuf_Protobuf_decode_obj, mod_TrezorProtobuf_Protobuf_decode);
-
-// Protobuf stuff
-
-STATIC const mp_rom_map_elem_t mod_TrezorProtobuf_Protobuf_locals_dict_table[] = {
-    { MP_ROM_QSTR(MP_QSTR_encode), MP_ROM_PTR(&mod_TrezorProtobuf_Protobuf_encode_obj) },
-    { MP_ROM_QSTR(MP_QSTR_decode), MP_ROM_PTR(&mod_TrezorProtobuf_Protobuf_decode_obj) },
-};
-STATIC MP_DEFINE_CONST_DICT(mod_TrezorProtobuf_Protobuf_locals_dict, mod_TrezorProtobuf_Protobuf_locals_dict_table);
-
-STATIC const mp_obj_type_t mod_TrezorProtobuf_Protobuf_type = {
-    { &mp_type_type },
-    .name = MP_QSTR_Protobuf,
-    .make_new = mod_TrezorProtobuf_Protobuf_make_new,
-    .locals_dict = (void*)&mod_TrezorProtobuf_Protobuf_locals_dict,
-};
-
-// module stuff
-
-STATIC const mp_rom_map_elem_t mp_module_TrezorProtobuf_globals_table[] = {
-    { MP_ROM_QSTR(MP_QSTR___name__), MP_ROM_QSTR(MP_QSTR_TrezorProtobuf) },
-    { MP_ROM_QSTR(MP_QSTR_Protobuf), MP_ROM_PTR(&mod_TrezorProtobuf_Protobuf_type) },
-};
-
-STATIC MP_DEFINE_CONST_DICT(mp_module_TrezorProtobuf_globals, mp_module_TrezorProtobuf_globals_table);
-
-const mp_obj_module_t mp_module_TrezorProtobuf = {
-    .base = { &mp_type_module },
-    .name = MP_QSTR_TrezorProtobuf,
-    .globals = (mp_obj_dict_t*)&mp_module_TrezorProtobuf_globals,
-};
-
-#endif // MICROPY_PY_TREZORPROTOBUF
diff --git a/extmod/modtrezorutils/modtrezorutils.c b/extmod/modtrezorutils/modtrezorutils.c
index 017cdca56a..938240a7d5 100644
--- a/extmod/modtrezorutils/modtrezorutils.c
+++ b/extmod/modtrezorutils/modtrezorutils.c
@@ -71,4 +71,4 @@ const mp_obj_module_t mp_module_TrezorUtils = {
     .globals = (mp_obj_dict_t*)&mp_module_TrezorUtils_globals,
 };
 
-#endif // MICROPY_PY_TREZORPROTOBUF
+#endif // MICROPY_PY_TREZORUTILS
diff --git a/src/trezor/protobuf.py b/src/trezor/protobuf.py
deleted file mode 100644
index 74c8c6b83f..0000000000
--- a/src/trezor/protobuf.py
+++ /dev/null
@@ -1,9 +0,0 @@
-from TrezorProtobuf import Protobuf
-
-_protobuf = Protobuf()
-
-def encode(data):
-    return _protobuf.encode(data)
-
-def decode(data):
-    return _protobuf.decode(data)
diff --git a/vendor/micropython b/vendor/micropython
index a978999665..4e2fda01bf 160000
--- a/vendor/micropython
+++ b/vendor/micropython
@@ -1 +1 @@
-Subproject commit a97899966537f6220531c3e98f5a610a8148f29c
+Subproject commit 4e2fda01bf6612823057886c98284ada320c8b22