diff --git a/CMakeLists.txt b/CMakeLists.txt
index 27d4df7..08378d7 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -20,6 +20,7 @@ set(LOG_LEVEL ARDUHAL_LOG_LEVEL_NONE)
 add_compile_definitions(TLS_CA_MAX_SIZE=1500)
 add_compile_definitions(TLS_CERT_MAX_SIZE=1500)
 add_compile_definitions(TLS_KEY_MAX_SIZE=1800)
+add_compile_definitions(TX_PAYLOAD_BUFFER_SIZE=6144)
 add_compile_definitions(ESP_PLATFORM)
 add_compile_definitions(ESP32)
 
diff --git a/Version.h b/Version.h
index f6f4dc2..bee0dcf 100644
--- a/Version.h
+++ b/Version.h
@@ -1,3 +1,3 @@
 #pragma once
 
-#define nuki_hub_version "7.0-arduino-mqtt-1"
\ No newline at end of file
+#define nuki_hub_version "7.0-arduino-mqtt-2"
\ No newline at end of file