diff --git a/index.html b/index.html
index 219332c3..8b6f04b2 100644
--- a/index.html
+++ b/index.html
@@ -219,8 +219,8 @@ a:hover {
                             <li>Filters.
                                 <ul>
                                     <li>Biquad</li>
-                                    <li>Low-pass (first and second order)</li>
-                                    <li>High-pass (first and second order)</li>
+                                    <li>Low-pass (first, second and high order)</li>
+                                    <li>High-pass (first, second and high order)</li>
                                     <li>Second order band-pass</li>
                                     <li>Second order notch</li>
                                     <li>Second order peaking</li>