diff --git a/registry.txt b/registry.txt
index 63771461..083b503c 100644
--- a/registry.txt
+++ b/registry.txt
@@ -2046,3 +2046,4 @@ https://github.com/ZulNs/LCD_HD44780.git|Contributed|LCD_HD44780
 https://github.com/JCardoen/ATmega32U4-Grove-Air-quality-sensor.git|Contributed|ATmega32U4 Grove Air quality sensor
 https://github.com/Programmable-Air/Code.git|Contributed|programmable_air
 https://github.com/paulo-raca/Arduino_AsyncLiquidCrystal.git|Contributed|AsyncLiquidCrystal
+https://github.com/RobotCing/Attiny85_IO.git|Contributed|Attiny85_IO