diff --git a/docs/www/random/conversions.php b/docs/www/random/conversions.php
index 508761a..b01e07b 100644
--- a/docs/www/random/conversions.php
+++ b/docs/www/random/conversions.php
@@ -285,7 +285,8 @@ display_header("Unit conversions");
 			</tr>
 		</table>
 		<div>
-			<img src="https://assets.zdenekborovec.cz/upload/c7bd96404989f2838ca2a750a843abd4/4f170f63ca9f6cec9aa956ab623c94e0/dc1b80834e33b69703cf629c4d96ac1f.png">
+			<img src="https://assets.zdenekborovec.cz/upload/c7bd96404989f2838ca2a750a843abd4/4f170f63ca9f6cec9aa956ab623c94e0/dc1b80834e33b69703cf629c4d96ac1f.png"
+				alt= "Pie chart showing the data from the table.">
 			<p>
 				Chart generated by <a href="https://www.meta-chart.com/pie">
 				meta-chart.com</a>