diff --git a/source/_integrations/htu21d.markdown b/source/_integrations/htu21d.markdown
index a687bb0e487..187f837bb5b 100644
--- a/source/_integrations/htu21d.markdown
+++ b/source/_integrations/htu21d.markdown
@@ -10,6 +10,14 @@ ha_platforms:
   - sensor
 ---
 
+<div class='note warning'>
+
+This integration is deprecated and will be removed in Home Assistant Core 2022.4.
+
+For more information see: [Architectural Decision Record 0019](https://github.com/home-assistant/architecture/blob/master/adr/0019-GPIO.md).
+
+</div>
+
 The `htu21d` sensor platform allows you to read the temperature and humidity from a [HTU21D sensor](https://cdn-shop.adafruit.com/datasheets/1899_HTU21D.pdf) connected via [I2c](https://en.wikipedia.org/wiki/I²C) bus (SDA, SCL pins).
 
 Tested devices: