diff --git a/config/esp32/partitions.csv b/config/esp32/partitions.csv
index 89fe79f..04dcea6 100755
--- a/config/esp32/partitions.csv
+++ b/config/esp32/partitions.csv
@@ -4,4 +4,4 @@
 nvs,      data, nvs,     0x9000,  0x6000
 phy_init, data, phy,     0xf000,  0x1000
 factory,  app,  factory,   0x10000, 1M,
-part0,    0x40, 0x1,     0x200000,  1M,
+part0,    0x40, 0x1,     0x200000,  2M,
diff --git a/sdkconfig.defaults b/sdkconfig.defaults
index 4086232..adb55e4 100755
--- a/sdkconfig.defaults
+++ b/sdkconfig.defaults
@@ -9,6 +9,8 @@ CONFIG_PARTITION_TABLE_CUSTOM=y
 CONFIG_PARTITION_TABLE_CUSTOM_FILENAME="config/esp32/partitions.csv"
 CONFIG_PARTITION_TABLE_FILENAME="config/esp32/partitions.csv"
 CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_ESPTOOLPY_FLASHMODE_QIO=y
+CONFIG_ESP_DEFAULT_CPU_FREQ_MHZ_240=y
 CONFIG_WL_SECTOR_SIZE_512=y
 CONFIG_WL_SECTOR_MODE_PERF=y
 COMPILER_OPTIMIZATION="Performance"
diff --git a/src/fs/low_flash.c b/src/fs/low_flash.c
index bfd43d9..a99f33c 100644
--- a/src/fs/low_flash.c
+++ b/src/fs/low_flash.c
@@ -149,10 +149,6 @@ void do_flash() {
             }
         }
         flash_available = false;
-#ifdef ESP_PLATFORM
-        esp_partition_munmap(fd_map);
-        esp_partition_mmap(part0, 0, part0->size, ESP_PARTITION_MMAP_DATA, (const void **)&map, (esp_partition_mmap_handle_t *)&fd_map);
-#endif
         mutex_exit(&mtx_flash);
     }
     sem_release(&sem_flash);