diff --git a/main/Kconfig.projbuild b/main/Kconfig.projbuild
index d8c5445..49bdef0 100644
--- a/main/Kconfig.projbuild
+++ b/main/Kconfig.projbuild
@@ -12,7 +12,7 @@ menu "TIC-to-MQTT Configuration"
         range 0 34 if IDF_TARGET_ESP32
         range 0 46 if IDF_TARGET_ESP32S2
         range 0 19 if IDF_TARGET_ESP32C3
-        default 16
+        default 23
         help
             GPIO number for UART RX pin.