diff --git a/CHANGELOG.md b/CHANGELOG.md
index 52a1b30b0..5a3da0ee0 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -24,6 +24,7 @@ All notable changes to this project will be documented in this file.
 ### Fixed
 - Deduplicate code and fix %timer n% rule regression from v12.2.0 (#16914)
 - Serial initialization for baudrate and config (#16970)
+- ModbusBridge buffer overflow (#16979)
 
 ### Removed
 - Define ``USE_PN532_DATA_RAW`` from NFC reader (#16939)
diff --git a/tasmota/tasmota_xdrv_driver/xdrv_63_modbus_bridge.ino b/tasmota/tasmota_xdrv_driver/xdrv_63_modbus_bridge.ino
index 0e39e97a6..31b1c7a19 100644
--- a/tasmota/tasmota_xdrv_driver/xdrv_63_modbus_bridge.ino
+++ b/tasmota/tasmota_xdrv_driver/xdrv_63_modbus_bridge.ino
@@ -258,7 +258,7 @@ void ModbusBridgeHandle(void)
       WiFiClient &client = modbusBridgeTCP.client_tcp[i];
       if (client)
       {
-        uint8_t header[8];
+        uint8_t header[9];
         uint8_t nrOfBytes = 8;
         header[0] = modbusBridgeTCP.tcp_transaction_id >> 8;
         header[1] = modbusBridgeTCP.tcp_transaction_id;