diff --git a/registry.txt b/registry.txt
index f7f0c81e..ec37f3af 100644
--- a/registry.txt
+++ b/registry.txt
@@ -7576,3 +7576,4 @@ https://github.com/mirs240x/micro_ros_arduino_mirs240x.git|Contributed|micro_ros
 https://github.com/dejwk/roo_time_ds3231.git|Contributed|roo_time_ds3231
 https://github.com/SequentMicrosystems/Sequent-16relays-Library.git|Contributed|SM_16RELAYS
 https://github.com/canusorn/CynoIOT.git|Contributed|CynoIOT
+https://github.com/biomurph/GrayCode.git|Contributed|GrayCode