diff --git a/include/pm3_cmd.h b/include/pm3_cmd.h
index 68d021f6b..54be972ed 100644
--- a/include/pm3_cmd.h
+++ b/include/pm3_cmd.h
@@ -891,7 +891,7 @@ typedef struct {
 #define BWM_OTA_ACTION_VERSION 0x04
 #define BWM_OTA_ACTION_REBOOT  0x05
 // Max firmware bytes per WRITE action.
-#define BWM_OTA_CHUNK_MAX     2048
+#define BWM_OTA_CHUNK_MAX     240
 // CMD_PM5_BWM_WIFI payload: [action:u8][port:u16 LE][ssid\0][pwd\0][hostname\0]
 #define BWM_WIFI_ACTION_START  0x00   // join AP + start TCP server
 #define BWM_WIFI_ACTION_STOP   0x01   // tear down, back to BLE-only