diff --git a/src/chapter-07/05-program-based-points-webgl.html b/src/chapter-07/05-program-based-points-webgl.html
index 261b6cd1..7f045add 100644
--- a/src/chapter-07/05-program-based-points-webgl.html
+++ b/src/chapter-07/05-program-based-points-webgl.html
@@ -23,6 +23,7 @@
                 init()
             })();
         </script>
+    </div>
 </body>
 
 </html>
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