diff --git a/layouts/shortcodes/sidenote.html b/layouts/shortcodes/sidenote.html
new file mode 100644
index 0000000..dc09c90
--- /dev/null
+++ b/layouts/shortcodes/sidenote.html
@@ -0,0 +1 @@
+<span class="sidenote-number"><small class="sidenote">{{ .Inner }}</small></span>