diff --git a/index.html b/index.html
index 48c8d99..126908d 100644
--- a/index.html
+++ b/index.html
@@ -32,19 +32,19 @@
 				<button id="rparen" type="button">)</button>
 
 				<div id="numerals">
-					<button id="7" type="button">7</button>
-					<button id="8" type="button">8</button>
-					<button id="9" type="button">9</button>
+					<button id="seven" type="button">7</button>
+					<button id="eight" type="button">8</button>
+					<button id="nine" type="button">9</button>
 
-					<button id="4" type="button">4</button>
-					<button id="5" type="button">5</button>
-					<button id="6" type="button">6</button>
+					<button id="four" type="button">4</button>
+					<button id="five" type="button">5</button>
+					<button id="six" type="button">6</button>
 
-					<button id="1" type="button">1</button>
-					<button id="2" type="button">2</button>
-					<button id="3" type="button">3</button>
+					<button id="one" type="button">1</button>
+					<button id="two" type="button">2</button>
+					<button id="three" type="button">3</button>
 
-					<button id="0" type="button">0</button>
+					<button id="zero" type="button">0</button>
 
 					<button id="backspace" type="button">⌫</button>
 				</div>