diff --git a/registry.txt b/registry.txt
index b8d2a19a..bf6cd9d0 100644
--- a/registry.txt
+++ b/registry.txt
@@ -2154,3 +2154,4 @@ https://github.com/dgduncan/Arduino-MCP4131.git|Contributed|MCP4131 library
 https://github.com/BeelanMX/arduino-LoRaWAN.git|Contributed|Arduino LoRaWAN by Beelan
 https://github.com/sauttefk/RS485HwSerial.git|Contributed|RS485HwSerial
 https://github.com/dmadison/HID_Buttons.git|Contributed|HID Buttons
+https://github.com/sleepdefic1t/BIP66.git|Contributed|BIP66