diff --git a/registry.txt b/registry.txt
index 8dc83979..36946744 100644
--- a/registry.txt
+++ b/registry.txt
@@ -2887,3 +2887,4 @@ https://github.com/adafruit/Adafruit_NAU7802.git|Contributed|Adafruit NAU7802 Li
 https://github.com/bridystone/SevSegShift.git|Contributed|SevSegShift
 https://github.com/adafruit/Adafruit_HTS221.git|Contributed|Adafruit HTS221
 https://github.com/gramedek/pio8255.git|Contributed|PIO8255
+https://github.com/ekkai/PMD4.git|Contributed|dustSensor_kocoa