diff --git a/index.html b/index.html
index 0ad82fe7..04ac8c38 100644
--- a/index.html
+++ b/index.html
@@ -55,7 +55,7 @@
 
 	const path = `https://raw.githubusercontent.com/braxtonhall/library-thing/main/${md}`;
 
-	const fixLinks = () =>
+	const fixLinks = () => {
 		$("a").each((_, element) => {
 			const $element = $(element);
 			const href = $element.attr("href");
@@ -63,6 +63,15 @@
 				$element.attr("href", `${href}.pretty`);
 			}
 		});
+		$("h1, h2, h3, h4").each((_, element) => {
+			const $element = $(element);
+			const text = $element.text();
+			const id = text.toLowerCase()
+				.replace(/ /g, "-")
+				.replace(/[^a-z-]/g, "");
+			$element.attr("id", id);
+		});
+	};
 
 	fetch(path)
 		.then((response) => response.text())