diff --git a/index.html b/index.html
index 126908d..efd0e1b 100644
--- a/index.html
+++ b/index.html
@@ -14,7 +14,7 @@
 
 				<div id="modulus-box">
 					<label id="modulus-label" for="modulus">mod</label>
-					<input id="modulus" required type="number" min="1" step="1" inputmode="none" />
+					<input id="modulus" required type="text" inputmode="numeric" pattern="\d+" />
 				</div>
 			</div>
 
@@ -57,7 +57,6 @@
 					<button id="enter" type="button">≡</button>
 				</div>
 			</div>
-
 		</div>
 
 		<script type="module" src="main.js"></script>