diff --git a/build.py b/build.py
index ea06fab..b5ca299 100755
--- a/build.py
+++ b/build.py
@@ -64,6 +64,11 @@ def main():
                 article.append(page_content)
                 page.article.replace_with(article)
 
+                # Rewrite links with markdown extensions
+                for a in page.css.select("a[href]"):
+                    if a["href"].endswith(".md"):
+                        a["href"] = a["href"][:-3] + ".html"
+
                 # Inject path into the nav
                 for i in range(len(dirpath.parts)):
                     a = page.new_tag("a")