diff --git a/index.html b/index.html
index 118bda8..7e95de1 100644
--- a/index.html
+++ b/index.html
@@ -23,7 +23,7 @@
 
     <br><br>
 
-    <h2>Quick sort discussion</h2>
+    <h3>Quick sort discussion</h3>
 
     <a class='src' href='http://gogs.benburlingham.com/ben.burlingham/d3-sort-visualization/src/master/js/quicksort.js'>Source Code</a>
 
@@ -58,7 +58,7 @@
     data-worst-memory='0'
     ></div>
 
-    <h2>Merge sort discussion</h2>
+    <h3>Merge sort discussion</h3>
 
     <a class='src' href='http://gogs.benburlingham.com/ben.burlingham/d3-sort-visualization/src/master/js/mergesort.js'>Source Code</a>
 
@@ -93,7 +93,7 @@
     data-worst-memory='O (n)'
     ></div>
 
-    <h2>Selection sort discussion</h2>
+    <h3>Selection sort discussion</h3>
 
     <a class='src' href='http://gogs.benburlingham.com/ben.burlingham/d3-sort-visualization/src/master/js/selectionsort.js'>Source Code</a>
 
@@ -126,7 +126,7 @@
     data-worst-memory='0'>
     </div>
 
-    <h2>Insertion sort discussion</h2>
+    <h3>Insertion sort discussion</h3>
 
     <a class='src' href='http://gogs.benburlingham.com/ben.burlingham/d3-sort-visualization/src/master/js/insertionsort.js'>Source Code</a>
 
@@ -157,7 +157,7 @@
     data-worst-memory='0'
     ></div>
 
-    <h2>Shellsort discussion</h2>
+    <h3>Shellsort discussion</h3>
 
     <a class='src' href='http://gogs.benburlingham.com/ben.burlingham/d3-sort-visualization/src/master/js/shellsort.js'>Source Code</a>
 
@@ -194,7 +194,7 @@
     data-worst-memory='n'
     ></div>
 
-    <h2>Bubble sort discussion</h2>
+    <h3>Bubble sort discussion</h3>
 
     <a class='src' href='http://gogs.benburlingham.com/ben.burlingham/d3-sort-visualization/src/master/js/bubblesort.js'>Source Code</a>
 
@@ -230,20 +230,20 @@
     ></div>
 
 <!--
-    <h2>radix sort discussion</h2>
+    <h3>radix sort discussion</h3>
 
     <div class="sorter" data-algorithm='radix'></div>
 
 <!--
-    <h2>Heapsort discussion</h2>
+    <h3>Heapsort discussion</h3>
 
     <div class="sorter"></div>
 
-    <h2>Bubblesort discussion</h2>
+    <h3>Bubblesort discussion</h3>
     NOTE http://stackoverflow.com/questions/17270628/insertion-sort-vs-bubble-sort-algorithms
     <div class="sorter"></div>
 
-    <h2>Radixsort discussion</h2>
+    <h3>Radixsort discussion</h3>
 
     <div class="sorter"></div>
  -->