diff --git a/core/SConscript.firmware b/core/SConscript.firmware
index 301ee5ee8..33c033d44 100644
--- a/core/SConscript.firmware
+++ b/core/SConscript.firmware
@@ -183,6 +183,7 @@ SOURCE_MICROPYTHON = [
     'vendor/micropython/lib/embed/abort_.c',
     #'vendor/micropython/lib/mp-readline/readline.c',
     'vendor/micropython/lib/utils/gchelper_m3.s',
+    'vendor/micropython/lib/utils/gchelper_native.c',
     'vendor/micropython/lib/utils/interrupt_char.c',
     'vendor/micropython/lib/utils/printf.c',
     'vendor/micropython/lib/utils/pyexec.c',
@@ -271,6 +272,7 @@ SOURCE_MICROPYTHON = [
     'vendor/micropython/py/repl.c',
     'vendor/micropython/py/runtime.c',
     'vendor/micropython/py/runtime_utils.c',
+    'vendor/micropython/py/scheduler.c',
     'vendor/micropython/py/scope.c',
     'vendor/micropython/py/sequence.c',
     'vendor/micropython/py/showbc.c',
diff --git a/core/SConscript.unix b/core/SConscript.unix
index 37c64080a..5ed1ceab4 100644
--- a/core/SConscript.unix
+++ b/core/SConscript.unix
@@ -9,7 +9,9 @@ TREZOR_MODEL = ARGUMENTS.get('TREZOR_MODEL', 'T')
 CCFLAGS_MOD = ''
 CPPPATH_MOD = []
 CPPDEFINES_MOD = []
-SOURCE_MOD = []
+SOURCE_MOD = [
+    'vendor/micropython/extmod/vfs_posix_file.c',
+]
 if EVERYTHING:
     SOURCE_MOD_SECP256K1_ZKP = []
 
@@ -304,8 +306,8 @@ SOURCE_UNIX = [
     'embed/unix/sdcard.c',
     'embed/unix/touch.c',
     'embed/unix/usb.c',
+    'vendor/micropython/lib/utils/gchelper_generic.c',
     'vendor/micropython/ports/unix/alloc.c',
-    'vendor/micropython/ports/unix/file.c',
     'vendor/micropython/ports/unix/gccollect.c',
     'vendor/micropython/ports/unix/input.c',
     'vendor/micropython/ports/unix/unix_mphal.c',
diff --git a/core/embed/firmware/mpconfigport.h b/core/embed/firmware/mpconfigport.h
index 4c84ce1e7..912cb7248 100644
--- a/core/embed/firmware/mpconfigport.h
+++ b/core/embed/firmware/mpconfigport.h
@@ -71,9 +71,7 @@
 #define MICROPY_REPL_AUTO_INDENT    (1)
 #define MICROPY_LONGINT_IMPL        (MICROPY_LONGINT_IMPL_MPZ)
 #define MICROPY_ENABLE_SOURCE_LINE  (1)
-#ifndef MICROPY_FLOAT_IMPL // can be configured by each board via mpconfigboard.mk
 #define MICROPY_FLOAT_IMPL          (MICROPY_FLOAT_IMPL_FLOAT)
-#endif
 #define MICROPY_STREAMS_NON_BLOCK   (1)
 #define MICROPY_MODULE_WEAK_LINKS   (1)
 #define MICROPY_CAN_OVERRIDE_BUILTINS (0)
@@ -93,6 +91,7 @@
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (1)
 #define MICROPY_PY_BUILTINS_FROZENSET (0)
 #define MICROPY_PY_BUILTINS_SLICE_ATTRS (1)
+#define MICROPY_PY_BUILTINS_SLICE_INDICES (0)
 #define MICROPY_PY_BUILTINS_ROUND_INT (0)
 #define MICROPY_PY_REVERSE_SPECIAL_METHODS (0)
 #define MICROPY_PY_ALL_SPECIAL_METHODS (0)
@@ -170,15 +169,10 @@
 
 #define MP_SSIZE_MAX (0x0fffffff)
 
-#define UINT_FMT "%u"
-#define INT_FMT "%d"
-
 typedef int mp_int_t; // must be pointer size
 typedef unsigned int mp_uint_t; // must be pointer size
 typedef long mp_off_t;
 
-#define MP_PLAT_PRINT_STRN(str, len) mp_hal_stdout_tx_strn_cooked(str, len)
-
 #include "irq.h"
 
 #define MICROPY_BEGIN_ATOMIC_SECTION()     disable_irq()
diff --git a/core/embed/unix/main.c b/core/embed/unix/main.c
index 109176dba..28335f78f 100644
--- a/core/embed/unix/main.c
+++ b/core/embed/unix/main.c
@@ -38,11 +38,13 @@
 #include <unistd.h>
 
 #include "extmod/misc.h"
+#include "extmod/vfs_posix.h"
 #include "genhdr/mpversion.h"
 #include "input.h"
 #include "py/builtin.h"
 #include "py/compile.h"
 #include "py/gc.h"
+#include "py/mperrno.h"
 #include "py/mphal.h"
 #include "py/mpthread.h"
 #include "py/repl.h"
@@ -706,6 +708,8 @@ MP_NOINLINE int main_(int argc, char **argv) {
   return ret & 0xff;
 }
 
+#if !MICROPY_VFS
+
 #ifdef TREZOR_EMULATOR_FROZEN
 uint mp_import_stat(const char *path) { return MP_IMPORT_STAT_NO_EXIST; }
 #else
@@ -722,6 +726,29 @@ uint mp_import_stat(const char *path) {
 }
 #endif
 
+#if MICROPY_PY_IO
+// Factory function for I/O stream classes, only needed if generic VFS subsystem
+// isn't used. Note: buffering and encoding are currently ignored.
+mp_obj_t mp_builtin_open(size_t n_args, const mp_obj_t *pos_args,
+                         mp_map_t *kwargs) {
+  enum { ARG_file, ARG_mode };
+  STATIC const mp_arg_t allowed_args[] = {
+      {MP_QSTR_file, MP_ARG_OBJ | MP_ARG_REQUIRED, {.u_rom_obj = MP_ROM_NONE}},
+      {MP_QSTR_mode, MP_ARG_OBJ, {.u_obj = MP_OBJ_NEW_QSTR(MP_QSTR_r)}},
+      {MP_QSTR_buffering, MP_ARG_INT, {.u_int = -1}},
+      {MP_QSTR_encoding, MP_ARG_OBJ, {.u_rom_obj = MP_ROM_NONE}},
+  };
+  mp_arg_val_t args[MP_ARRAY_SIZE(allowed_args)];
+  mp_arg_parse_all(n_args, pos_args, kwargs, MP_ARRAY_SIZE(allowed_args),
+                   allowed_args, args);
+  return mp_vfs_posix_file_open(&mp_type_textio, args[ARG_file].u_obj,
+                                args[ARG_mode].u_obj);
+}
+MP_DEFINE_CONST_FUN_OBJ_KW(mp_builtin_open_obj, 1, mp_builtin_open);
+#endif
+
+#endif
+
 void nlr_jump_fail(void *val) {
   printf("FATAL: uncaught NLR %p\n", val);
   exit(1);
diff --git a/core/embed/unix/mpconfigport.h b/core/embed/unix/mpconfigport.h
index 26e90ae25..dd4e52f0a 100644
--- a/core/embed/unix/mpconfigport.h
+++ b/core/embed/unix/mpconfigport.h
@@ -82,6 +82,7 @@
 #define MICROPY_STREAMS_NON_BLOCK   (1)
 #define MICROPY_MODULE_WEAK_LINKS   (1)
 #define MICROPY_CAN_OVERRIDE_BUILTINS (0)
+#define MICROPY_VFS_POSIX_FILE      (1)
 #define MICROPY_USE_INTERNAL_ERRNO  (0)
 #define MICROPY_ENABLE_SCHEDULER    (0)
 #define MICROPY_SCHEDULER_DEPTH     (0)
@@ -98,6 +99,7 @@
 #define MICROPY_PY_BUILTINS_MEMORYVIEW (1)
 #define MICROPY_PY_BUILTINS_FROZENSET (0)
 #define MICROPY_PY_BUILTINS_SLICE_ATTRS (1)
+#define MICROPY_PY_BUILTINS_SLICE_INDICES (0)
 #define MICROPY_PY_BUILTINS_ROUND_INT (0)
 #define MICROPY_PY_REVERSE_SPECIAL_METHODS (0)
 #define MICROPY_PY_ALL_SPECIAL_METHODS (0)
@@ -163,6 +165,10 @@
 // check stdout a chance to pass, etc.
 #define MICROPY_DEBUG_PRINTER       (&mp_stderr_print)
 #define MICROPY_ASYNC_KBD_INTR      (1)
+
+#define mp_type_fileio mp_type_vfs_posix_fileio
+#define mp_type_textio mp_type_vfs_posix_textio
+
 // Define to MICROPY_ERROR_REPORTING_DETAILED to get function, etc.
 // names in exception messages (may require more RAM).
 #define MICROPY_ERROR_REPORTING     (MICROPY_ERROR_REPORTING_DETAILED)
@@ -240,12 +246,6 @@ void mp_unix_mark_exec(void);
 #define MICROPY_FORCE_PLAT_ALLOC_EXEC (1)
 #endif
 
-#if MICROPY_PY_OS_DUPTERM
-#define MP_PLAT_PRINT_STRN(str, len) mp_hal_stdout_tx_strn_cooked(str, len)
-#else
-#define MP_PLAT_PRINT_STRN(str, len) do { ssize_t ret = write(1, str, len); (void)ret; } while (0)
-#endif
-
 #ifdef __linux__
 // Can access physical memory using /dev/mem
 #define MICROPY_PLAT_DEV_MEM  (1)
diff --git a/vendor/micropython b/vendor/micropython
index d9712224e..aa4d6db97 160000
--- a/vendor/micropython
+++ b/vendor/micropython
@@ -1 +1 @@
-Subproject commit d9712224e86b935ae74186c717efdddbdf3058de
+Subproject commit aa4d6db97f9952440dca3acb194bcb6b696d7217