diff --git a/main/message_parser.h b/main/message_parser.h
index 8b1c0cf..26e1fd6 100644
--- a/main/message_parser.h
+++ b/main/message_parser.h
@@ -4,7 +4,7 @@
 #include <stddef.h>
 #include <stdint.h>
 
-#define MAX_MESSAGE_PAYLOAD_LENGTH 128
+#define MAX_MESSAGE_PAYLOAD_LENGTH 512
 #define MAX_TOTAL_CONTENT_LENGTH (MAX_MESSAGE_PAYLOAD_LENGTH + 1)
 
 enum ParserState {
@@ -33,7 +33,7 @@ struct MessageReceive {
   enum ParserError error;
   uint8_t messageid;
   uint8_t message[MAX_MESSAGE_PAYLOAD_LENGTH];
-  uint8_t index;
+  uint16_t index;
   uint8_t checksum;
 };