diff --git a/Rule-Cookbook.md b/Rule-Cookbook.md
index 430533a1..4f5b7c5e 100644
--- a/Rule-Cookbook.md
+++ b/Rule-Cookbook.md
@@ -28,7 +28,7 @@
 - [Distinguish Switch1 and Switch2 without the use of Relay1 and Relay2](#distinguish-switch1-and-switch2-without-the-use-of-relay1-and-relay2)
 - [Receiving state of anything that triggers SWITCH more than one time](#receiving-state-of-anything-that-triggers-switch-more-than-one-time)
 - [Prevent Wemos D1 mini load overcurrent](#prevent-wemos-d1-mini-load-overcurrent)
-- [Using dummy relays to send Serial codes to the MCU](#Using-dummy-relays-to-send-Serial-codes-to-the-MCU)
+- [Using dummy GPIO to send Serial codes to the MCU](#Using-dummy-gpio-to-send-Serial-codes-to-the-MCU)
 - [Arithmetic Commands to be used with VARs](#arithmetic-commands-to-be-used-with-vars)
   - [Sending the value of a sensor to MQTT only when a delta is reached](#sending-the-value-of-a-sensor-to-mqtt-only-when-a-delta-is-reached)
   - [Adjust the value of a sensor and send it by MQTT](#adjust-the-value-of-a-sensor-and-send-it-by-mqtt)
@@ -1096,7 +1096,7 @@ Result
 
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-#### Using dummy relays to send Serial codes to the MCU
+#### Using dummy GPIO to send Serial codes to the MCU
 
 By having a device (an [Oil Diffusser](https://blakadder.github.io/templates/oil_diffuser_550ml.html)) that controls all its features through an MCU and reports the states in serial codes to the ESP8266 I had to create some rules to control it using the Web UI or standard Power commands.