diff --git a/registry.txt b/registry.txt
index 02b13a1a..588ea8cd 100644
--- a/registry.txt
+++ b/registry.txt
@@ -3134,3 +3134,4 @@ https://github.com/sblantipodi/arduino_bootstrapper.git|Contributed|Bootstrapper
 https://github.com/adameat/MaximWire.git|Contributed|MaximWire
 https://github.com/cesanta/mjson.git|Contributed|mjson
 https://github.com/sparkfun/SparkFun_IridiumSBD_I2C_Arduino_Library.git|Contributed|IridiumSBDi2c
+https://github.com/adafruit/Adafruit_PM25AQI.git|Contributed|Adafruit PM25 AQI Sensor