diff --git a/partitions.csv b/partitions.csv
index fc9a91e..02d493a 100644
--- a/partitions.csv
+++ b/partitions.csv
@@ -3,5 +3,5 @@
 nvs,      data, nvs,     ,        0x4000,
 otadata,  data, ota,     ,        0x2000,
 phy_init, data, phy,     ,        0x1000,
-dfu,      app,  factory, ,        200K,
-app,      app,  ota_0,   ,        1M,
+dfu,      app,  factory, ,        222K,
+app,      app,  ota_0,   ,        3700K,
diff --git a/sdkconfig.defaults b/sdkconfig.defaults
index 858ccdb..8f0d81b 100644
--- a/sdkconfig.defaults
+++ b/sdkconfig.defaults
@@ -1,6 +1,11 @@
 CONFIG_IDF_TARGET="esp32s2"
 CONFIG_IDF_TARGET_ESP32S2=y
 #
+# Serial flasher config
+#
+CONFIG_ESPTOOLPY_FLASHSIZE_4MB=y
+CONFIG_ESPTOOLPY_FLASHSIZE="4MB"
+#
 # TinyUSB (with DFU) Stack
 #
 CONFIG_TINYUSB_DFU=y