diff --git a/html/index.html b/html/index.html
index 4cf101e..9265c4c 100644
--- a/html/index.html
+++ b/html/index.html
@@ -273,7 +273,7 @@ <h2>Timer: <span id="timer">30</span> seconds</h2>
             {
                 buttonEvent(this.getAttribute("id"),1);
             });
-            cells[i].addEventListener("mouserelease",function()
+            cells[i].addEventListener("onmouseup",function()
             {
                 buttonEvent(this.getAttribute("id"),2);
             });