diff --git a/docs/spec/00.00.05.toc.md b/docs/spec/00.00.05.toc.md
index 9608fde..e5d4dc8 100644
--- a/docs/spec/00.00.05.toc.md
+++ b/docs/spec/00.00.05.toc.md
@@ -1,4 +1,4 @@
-<a class="btn btn-primary" role="button" data-toggle="collapse" href="#contents" aria-expanded="false" aria-controls="contents">Contents</a>
+<a class="btn btn-xs btn-primary" role="button" data-toggle="collapse" href="#contents" aria-expanded="false" aria-controls="contents"><b>Contents</b></a>
 
 <div id="contents" class="collapse" markdown="1">