diff --git a/ports/esp32/README.md b/ports/esp32/README.md
index bc24e5cd71ad6..8597c85ec3103 100644
--- a/ports/esp32/README.md
+++ b/ports/esp32/README.md
@@ -28,7 +28,7 @@ manage the ESP32 microcontroller, as well as a way to manage the required
 build environment and toolchains needed to build the firmware.
 
 The ESP-IDF changes quickly and MicroPython only supports certain versions.
-Currently MicroPython supports v5.2, v5.2.2, and v5.3.
+Currently MicroPython supports v5.2, v5.2.2, v5.3 and v5.4.
 
 To install the ESP-IDF the full instructions can be found at the
 [Espressif Getting Started guide](https://docs.espressif.com/projects/esp-idf/en/latest/esp32/get-started/index.html#installation-step-by-step).
diff --git a/ports/esp32/network_ppp.c b/ports/esp32/network_ppp.c
index 5c41cf948c1ed..4dd5a3718c295 100644
--- a/ports/esp32/network_ppp.c
+++ b/ports/esp32/network_ppp.c
@@ -100,7 +100,12 @@ static mp_obj_t ppp_make_new(mp_obj_t stream) {
 }
 MP_DEFINE_CONST_FUN_OBJ_1(esp_network_ppp_make_new_obj, ppp_make_new);
 
-static u32_t ppp_output_callback(ppp_pcb *pcb, u8_t *data, u32_t len, void *ctx) {
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 0)
+static u32_t ppp_output_callback(ppp_pcb *pcb, const void *data, u32_t len, void *ctx)
+#else
+static u32_t ppp_output_callback(ppp_pcb *pcb, u8_t *data, u32_t len, void *ctx)
+#endif
+{
     ppp_if_obj_t *self = ctx;
 
     mp_obj_t stream = self->stream;
@@ -109,7 +114,7 @@ static u32_t ppp_output_callback(ppp_pcb *pcb, u8_t *data, u32_t len, void *ctx)
     }
 
     int err;
-    return mp_stream_rw(stream, data, len, &err, MP_STREAM_RW_WRITE);
+    return mp_stream_rw(stream, (void *)data, len, &err, MP_STREAM_RW_WRITE);
 }
 
 static void pppos_client_task(void *self_in) {
diff --git a/ports/esp32/network_wlan.c b/ports/esp32/network_wlan.c
index fed81d28cb6a6..e85d1328fdc2b 100644
--- a/ports/esp32/network_wlan.c
+++ b/ports/esp32/network_wlan.c
@@ -763,6 +763,10 @@ static const mp_rom_map_elem_t wlan_if_locals_dict_table[] = {
     #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
     { MP_ROM_QSTR(MP_QSTR_SEC_DPP), MP_ROM_INT(WIFI_AUTH_DPP) },
     #endif
+    #if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 0)
+    { MP_ROM_QSTR(MP_QSTR_SEC_WPA3_ENT), MP_ROM_INT(WIFI_AUTH_WPA3_ENTERPRISE) },
+    { MP_ROM_QSTR(MP_QSTR_SEC_WPA2_WPA3_ENT), MP_ROM_INT(WIFI_AUTH_WPA2_WPA3_ENTERPRISE) },
+    #endif
 
     { MP_ROM_QSTR(MP_QSTR_PM_NONE), MP_ROM_INT(WIFI_PS_NONE) },
     { MP_ROM_QSTR(MP_QSTR_PM_PERFORMANCE), MP_ROM_INT(WIFI_PS_MIN_MODEM) },
@@ -770,7 +774,9 @@ static const mp_rom_map_elem_t wlan_if_locals_dict_table[] = {
 };
 static MP_DEFINE_CONST_DICT(wlan_if_locals_dict, wlan_if_locals_dict_table);
 
-#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
+#if ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 4, 0)
+_Static_assert(WIFI_AUTH_MAX == 16, "Synchronize WIFI_AUTH_XXX constants with the ESP-IDF. Look at esp-idf/components/esp_wifi/include/esp_wifi_types_generic.h");
+#elif ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 3, 0)
 _Static_assert(WIFI_AUTH_MAX == 14, "Synchronize WIFI_AUTH_XXX constants with the ESP-IDF. Look at esp-idf/components/esp_wifi/include/esp_wifi_types_generic.h");
 #elif ESP_IDF_VERSION >= ESP_IDF_VERSION_VAL(5, 2, 0)
 _Static_assert(WIFI_AUTH_MAX == 13, "Synchronize WIFI_AUTH_XXX constants with the ESP-IDF. Look at esp-idf/components/esp_wifi/include/esp_wifi_types.h");
diff --git a/py/persistentcode.c b/py/persistentcode.c
index 0843d1a2c52e6..840ee49d3e4eb 100644
--- a/py/persistentcode.c
+++ b/py/persistentcode.c
@@ -402,7 +402,7 @@ static mp_raw_code_t *load_raw_code(mp_reader_t *reader, mp_module_context_t *co
 
     #if MICROPY_EMIT_MACHINE_CODE
     } else {
-        const uint8_t *prelude_ptr;
+        const uint8_t *prelude_ptr = NULL;
         #if MICROPY_EMIT_NATIVE_PRELUDE_SEPARATE_FROM_MACHINE_CODE
         if (kind == MP_CODE_NATIVE_PY) {
             // Executable code cannot be accessed byte-wise on this architecture, so copy