diff --git a/main/ota_update.c b/main/ota_update.c
index 38b7bdf..64b3f92 100644
--- a/main/ota_update.c
+++ b/main/ota_update.c
@@ -5,7 +5,7 @@
 #include <stdint.h>
 #include <string.h>
 
-static uint8_t updateBuffer[4000];
+static uint8_t updateBuffer[UPDATE_BUFFER_SIZE];
 static const char *TAG = "ALOX - OTA";
 
 void start_uart_update(uint8_t msgid, const uint8_t *payload,
@@ -46,5 +46,5 @@ void end_uart_update(uint8_t msgid, const uint8_t *payload, size_t payload_len,
 }
 
 void init_ota() {
-  RegisterCallback(uint8_t msgid, RegisterFunctionCallback callback);
+  // RegisterCallback(uint8_t msgid, RegisterFunctionCallback callback);
 }
diff --git a/main/ota_update.h b/main/ota_update.h
index 2792b78..8f32620 100644
--- a/main/ota_update.h
+++ b/main/ota_update.h
@@ -1,4 +1,7 @@
 #ifndef OTA_UPDATE_H
 #define OTA_UPDATE_H
 
+#define UPDATE_BUFFER_SIZE 4000
+#define UPDATE_PAYLOAD_SIZE 200
+
 #endif