diff --git a/docs/index.html b/docs/index.html
index 56cad609..54795833 100644
--- a/docs/index.html
+++ b/docs/index.html
@@ -31,7 +31,7 @@
 		<meta property="og:locale" content="en-GB" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="2013-06-13T12:00:00+00:00" />
-		<meta property="og:updated_time" content="2020-09-18T22:25:05+00:00" />
+		<meta property="og:updated_time" content="2020-09-18T22:28:34+00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
diff --git a/docs/ja-JP/index.html b/docs/ja-JP/index.html
index 07498a1d..baa68836 100644
--- a/docs/ja-JP/index.html
+++ b/docs/ja-JP/index.html
@@ -32,7 +32,7 @@
 		<meta property="og:locale" content="ja-JP" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="2013-06-13T12:00:00+00:00" />
-		<meta property="og:updated_time" content="2020-09-18T22:25:05+00:00" />
+		<meta property="og:updated_time" content="2020-09-18T22:28:34+00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
@@ -155,8 +155,8 @@
 				<h1 id="toc">目次</h1>
 				<h4>Preamble</h4>
 				<ol class="preamble">
-					<li><a href="ja-JP/#preface">まえがき </a></li>
-					<li><a href="ja-JP/#changelog">What's new</a></li>
+					<li><a href="ja-JP/index.html#preface">まえがき </a></li>
+					<li><a href="ja-JP/index.html#changelog">What's new</a></li>
 				</ol>
 				<h4>Main content</h4>
 				<ol>
diff --git a/docs/news/2020-09-20.html b/docs/news/2020-09-20.html
index 1bcf8836..040046a5 100644
--- a/docs/news/2020-09-20.html
+++ b/docs/news/2020-09-20.html
@@ -26,7 +26,7 @@
 		<meta property="og:locale" content="en-GB" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="2020-09-20T12:00:00+00:00" />
-		<meta property="og:updated_time" content="2020-09-18T22:25:05+00:00" />
+		<meta property="og:updated_time" content="2020-09-18T22:28:34+00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
diff --git a/docs/zh-CN/index.html b/docs/zh-CN/index.html
index 3b56d445..162491a5 100644
--- a/docs/zh-CN/index.html
+++ b/docs/zh-CN/index.html
@@ -32,7 +32,7 @@
 		<meta property="og:locale" content="zh-CN" />
 		<meta property="og:type" content="article" />
 		<meta property="og:published_time" content="2013-06-13T12:00:00+00:00" />
-		<meta property="og:updated_time" content="2020-09-18T22:25:05+00:00" />
+		<meta property="og:updated_time" content="2020-09-18T22:28:34+00:00" />
 		<meta property="og:author" content="Mike 'Pomax' Kamermans" />
 		<meta property="og:section" content="Bézier Curves" />
 		<meta property="og:tag" content="Bézier Curves" />
@@ -155,8 +155,8 @@
 				<h1 id="toc">目录</h1>
 				<h4>Preamble</h4>
 				<ol class="preamble">
-					<li><a href="zh-CN/#preface">序言 </a></li>
-					<li><a href="zh-CN/#changelog">What's new</a></li>
+					<li><a href="zh-CN/index.html#preface">序言 </a></li>
+					<li><a href="zh-CN/index.html#changelog">What's new</a></li>
 				</ol>
 				<h4>Main content</h4>
 				<ol>
diff --git a/src/build/create-index-pages.js b/src/build/create-index-pages.js
index 237d9cf2..7bf2d67b 100644
--- a/src/build/create-index-pages.js
+++ b/src/build/create-index-pages.js
@@ -17,7 +17,7 @@ async function createIndexPages(locale, localeStrings, chapters) {
   const langSwitcher = generateLangSwitcher(localeStrings);
   const toclist = {};
 
-  const localePrefix = base ? `${locale}/` : ``;
+  const localePrefix = base ? `${locale}/index.html` : ``;
   const preface = `<section id="preface">${chapters[sectionOrder[0]]}</section>`;
   const sections = formSectionData(chapters, sectionOrder, toclist, locale, base);
   const sectionText = finaliseSections(sections);