diff --git a/repositories.txt b/repositories.txt
index 131cdf83..a7c3f5b7 100644
--- a/repositories.txt
+++ b/repositories.txt
@@ -985,6 +985,7 @@ https://github.com/ArminJo/Arduino-BlueDisplay
 https://github.com/ArminJo/Arduino-FrequencyDetector
 https://github.com/ArminJo/ATtinySerialOut
 https://github.com/ArminJo/AvrTracing
+https://github.com/ArminJo/digitalWriteFast
 https://github.com/ArminJo/EasyButtonAtInt01
 https://github.com/ArminJo/NeoPatterns
 https://github.com/ArminJo/PlayRtttl