diff --git a/README.md b/README.md
index 3a3b80e..1920d6e 100644
--- a/README.md
+++ b/README.md
@@ -69,9 +69,9 @@
 - [ExternalSensor](https://github.com/openbmc/docs/blob/master/designs/external-sensor.md)
   virtual sensor
 
-# Sensor Type Documentation
+## Sensor Type Documentation
 
-## ADC Sensors
+### ADC Sensors
 
 ADC sensors are sensors based on an Analog to Digital Converter. They are read
 via the Linux kernel Industrial I/O subsystem (IIO).