diff --git a/repositories.txt b/repositories.txt
index 1d2ee9b5..adf31e3e 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -5145,3 +5145,4 @@ https://github.com/NewhavenDisplay/NHD-Character-LCD-Library
 https://github.com/khoih-prog/ATtiny_TimerInterrupt
 https://github.com/berrak/LedTask
 https://github.com/asjdf/WebSerialLite
+https://github.com/khoih-prog/ATtiny_Slow_PWM