diff --git a/templates/index.html b/templates/index.html
index 832b58f..e0d7485 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -432,7 +432,7 @@ footer {
 					<tr class="file">
 						<td></td>
 						<td>
-							<form action="/spectrogram.php">
+							<form action="/spectrogram.png">
                                                     	    <input type="submit" value="Spectrogram View">
 							</form>