diff --git a/main.js b/main.js
index b1e1adc..b9d8c1d 100644
--- a/main.js
+++ b/main.js
@@ -123,10 +123,9 @@ document.querySelector("#rparen").addEventListener("click", () => keyPress(")"))
 
 document.querySelector("#pow").addEventListener("click", () => keyPress("^"));
 document.querySelector("#inv").addEventListener("click", () => keyPress("^-1"));
+document.querySelector("#sqrt").addEventListener("click", () => keyPress("sqrt("));
 
 document.querySelector("#clear").addEventListener("click", clear);
 document.querySelector("#enter").addEventListener("click", evaluate);
 
 document.querySelector("#backspace").addEventListener("click", backspace);
-
-// TODO implement square root key