diff --git a/registry.txt b/registry.txt
index aa1d8eaa..88b09924 100644
--- a/registry.txt
+++ b/registry.txt
@@ -5244,3 +5244,4 @@ https://github.com/berrak/LedTask.git|Contributed|LedTask
 https://github.com/asjdf/WebSerialLite.git|Contributed|WebSerialLite
 https://github.com/adafruit/Adafruit_LTR329_LTR303.git|Recommended|Adafruit LTR329 and LTR303
 https://github.com/lucas-inacio/TinyLiquidCrystal_I2C.git|Contributed|TinyLiquidCrystal_I2C
+https://github.com/khoih-prog/ATtiny_Slow_PWM.git|Contributed|ATtiny_Slow_PWM