diff --git a/README.md b/README.md
index 35b1eb9..16f9148 100644
--- a/README.md
+++ b/README.md
@@ -32,7 +32,7 @@ This project has a number of, well, elements. Each is named after an element in
 | [chlorine](https://github.com/500Foods/Philement/tree/main/elements/017-chlorine/README.md) | 🔨 | TMS WEB Core project for the www.philement.com website. <tr></tr> || 
 | [argon](https://github.com/500Foods/Philement/tree/main/elements/018-argon/README.md) | 💡 | Filament extruder - recycle that waste plastic! <tr></tr> || 
 | [potassium](https://github.com/500Foods/Philement/tree/main/elements/019-potassium/README.md) | 💡 | Power monitoring <tr></tr> || 
-
+| [calcium](https://github.com/500Foods/Philement/tree/main/elements/020-calcium/README.md) | 💡 | Optimization wizard. Combining parts of beryllium with parts of boron. <tr></tr> || 
 <sup>💡 → Idea and Planning Stage &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 🔨 → Working on it &nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp;&nbsp; 🏆 → Nowhere near done but... Check it out!</sup>
 
 ## Additional Notes