diff --git a/heating-temperature-probes.yaml b/heating-temperature-probes.yaml
index d2fd5ae..336d4ee 100644
--- a/heating-temperature-probes.yaml
+++ b/heating-temperature-probes.yaml
@@ -36,7 +36,7 @@ web_server:
 
 one_wire:
   - platform: gpio
-    pin: GPIO04
+    pin: GPIO4
 
 sensor:
   # WiFi Signal