diff --git a/luago.lua b/luago.lua
index 12aeb8a..7c0a41c 100644
--- a/luago.lua
+++ b/luago.lua
@@ -135,6 +135,7 @@ for index, value in ipairs(markdownFiles) do
         markdownFiles[index].content = markdownFiles[index].content:gsub("###%s*(.-)%s*<br>", "<h3>%1</h3>")
         markdownFiles[index].content = markdownFiles[index].content:gsub("##%s*(.-)%s*<br>", "<h2>%1</h2>")
         markdownFiles[index].content = markdownFiles[index].content:gsub("#%s*(.-)%s*<br>", "<h1>%1</h1>")
+        -- TODO: h1 and h2 using == and --
         -- bold and italic text
         markdownFiles[index].content = markdownFiles[index].content:gsub("%*%*(.-)%*%*", "<b>%1</b>")
         markdownFiles[index].content = markdownFiles[index].content:gsub("%*(.-)%*", "<i>%1</i>")
@@ -146,6 +147,8 @@ for index, value in ipairs(markdownFiles) do
         markdownFiles[index].content = markdownFiles[index].content:gsub("%[(.-)%]%((.-)%)", '<a href="%2">%1</a>')
         -- code
         markdownFiles[index].content = markdownFiles[index].content:gsub("`(.-)`", "<code>%1</code>")
+        -- horizontal rule
+        markdownFiles[index].content = markdownFiles[index].content:gsub("%-%-%-", "<hr>")
 
         -- replace <!-- sitecontents --> with markdown file content
         local start_idx, end_idx = content:find("<!-- sitecontents -->", 1, true)