diff --git a/README b/README
index 3c576d7..c2cf987 100644
--- a/README
+++ b/README
@@ -27,6 +27,6 @@
 To publish the built site, commit the output into the "asf-site" branch.
 
 Note that as of this writing, the "docgen" dependency is get from the Ivy
-repo on the published homepage (http://freemarker.apache.org/repos/ivy/). Those
+repo on the published homepage (https://freemarker.apache.org/repos/ivy/). Those
 modifying docgen should upload the fresh docgen jar there. Then you need to
 run `ant update-deps` here to grab the latest version.
diff --git a/build.xml b/build.xml
index 995bfa3..e00b4a3 100644
--- a/build.xml
+++ b/build.xml
@@ -95,7 +95,7 @@
   >
     <echo>Getting dependencies...</echo>
     <echo>-------------------------------------------------------</echo>
-    <ivy:settings id="remote" url="http://freemarker.apache.org/repos/ivy/ivysettings-remote.xml" />
+    <ivy:settings id="remote" url="https://freemarker.apache.org/repos/ivy/ivysettings-remote.xml" />
     <!-- Build an own repository that will serve us even offline: -->
     <ivy:retrieve settingsRef="remote" sync="true"
       ivypattern=".ivy.part/repo/[organisation]/[module]/ivy-[revision].xml"
diff --git a/src/main/docgen/book.xml b/src/main/docgen/book.xml
index 420b2f7..0a5cbf6 100644
--- a/src/main/docgen/book.xml
+++ b/src/main/docgen/book.xml
@@ -186,7 +186,7 @@
       site</link>.</para>
 
       <para><link
-      xlink:href="http://freemarker.apache.org/docs/versions_2_3_27.html">See what's
+      xlink:href="https://freemarker.apache.org/docs/versions_2_3_27.html">See what's
       new...</link></para>
 
       <para>Downloads:</para>
@@ -1076,7 +1076,7 @@
 
             <tr valign="top">
               <td><link
-              xlink:href="http://freemarker.apache.org">freemarker.apache.org</link></td>
+              xlink:href="https://freemarker.apache.org">freemarker.apache.org</link></td>
 
               <td>Not surprisingly, the pages you view right now are generated
               using FreeMarker.</td>
@@ -1460,7 +1460,7 @@
               <listitem>
                 <para>RC documentation (Manual + JavaDoc) is only published
                 under
-                http://freemarker.apache.org/builds/<replaceable>X.X.X</replaceable>-rc<replaceable>X</replaceable>/</para>
+                https://freemarker.apache.org/builds/<replaceable>X.X.X</replaceable>-rc<replaceable>X</replaceable>/</para>
               </listitem>
             </itemizedlist>
           </listitem>
@@ -1587,7 +1587,7 @@
 
           <listitem>
             <para>Upload the content of <literal>documentation/_html</literal>
-            from the binary release to http://freemarker.apache.org/<emphasis
+            from the binary release to https://freemarker.apache.org/<emphasis
             role="bold">builds/<replaceable>X.X.X</replaceable>-voting</emphasis>/documentation/
             (by committing it into the <quote>asf-site</quote> branch of
             https://git-wip-us.apache.org/repos/asf/incubator-freemarker-site.git).
@@ -1665,7 +1665,7 @@
 
                   <listitem>
                     <para>Link the change log (page under
-                    http://freemarker.apache.org/builds/<replaceable>X.X.X</replaceable>/)</para>
+                    https://freemarker.apache.org/builds/<replaceable>X.X.X</replaceable>/)</para>
                   </listitem>
 
                   <listitem>
@@ -1748,7 +1748,7 @@
           </listitem>
 
           <listitem>
-            <para>Update http://freemarker.apache.org:</para>
+            <para>Update https://freemarker.apache.org:</para>
 
             <itemizedlist>
               <listitem>
@@ -1927,7 +1927,7 @@
         <para>Docgen is not published to the Maven Central Repository, as it's
         only used as an internal build dependency. Currently, it's published
         manually to the internal Ivy repository of the project, which is under
-        http://freemarker.apache.org/repos/ivy/. If you modify Docgen, don't forget
+        https://freemarker.apache.org/repos/ivy/. If you modify Docgen, don't forget
         to publish there, or else the next site update or FreeMarker release
         will use an outdated version. For that:</para>
 
@@ -1939,7 +1939,7 @@
           <listitem>
             <para>Upload the content of the resulting
             <literal>build\dummy-server-ivy-repo</literal> directory to
-            <literal>http://freemarker.apache.org/repos/ivy/</literal>. See how to
+            <literal>https://freemarker.apache.org/repos/ivy/</literal>. See how to
             update the contents of freemarker.apache.org <link
             linkend="updating-homepage">here...</link></para>
           </listitem>
diff --git a/src/main/docgen/docgen.cjson b/src/main/docgen/docgen.cjson
index 089062c..c0a2d07 100644
--- a/src/main/docgen/docgen.cjson
+++ b/src/main/docgen/docgen.cjson
@@ -44,7 +44,7 @@
 }
 
 logo: {
-  href: "http://freemarker.apache.org/"
+  href: "https://freemarker.apache.org/"
   src: logo.png
   alt: "FreeMarker"
 }
diff --git a/src/main/docgen/sitemap-index.xml b/src/main/docgen/sitemap-index.xml
index c4ce3fb..c0d09de 100644
--- a/src/main/docgen/sitemap-index.xml
+++ b/src/main/docgen/sitemap-index.xml
@@ -19,11 +19,11 @@
 -->
  <sitemapindex xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
    <sitemap>
-      <loc>http://freemarker.apache.org/sitemap.xml</loc>
+      <loc>https://freemarker.apache.org/sitemap.xml</loc>
       <lastmod>2015-07-20</lastmod>
    </sitemap>
    <sitemap>
-      <loc>http://freemarker.apache.org/docs/sitemap.xml</loc>
+      <loc>https://freemarker.apache.org/docs/sitemap.xml</loc>
       <lastmod>2015-07-20</lastmod>
    </sitemap>
  </sitemapindex>