diff --git a/registry.txt b/registry.txt
index 189791b4..5c395d58 100644
--- a/registry.txt
+++ b/registry.txt
@@ -4058,3 +4058,4 @@ https://github.com/kulbhushanchand/MCP4251.git|Contributed|MCP4251
 https://github.com/ARTS37/SerialMenuCmd.git|Contributed|SerialMenuCmd
 https://github.com/ArduinoShop/Seg7.git|Contributed|Seg7
 https://github.com/RobTillaart/TSL235R.git|Contributed|TSL235R
+https://github.com/RobTillaart/relativity.git|Contributed|relativity