diff --git a/manual/develop.rst b/manual/develop.rst
index b03cc0d749..e37d86e596 100644
--- a/manual/develop.rst
+++ b/manual/develop.rst
@@ -3,7 +3,7 @@
 Setting up a calibre development environment
 ===========================================================
 
-calibre is completely open source, licensed under the `GNU GPL v3 <http://www.gnu.org/copyleft/gpl.html>`_.
+calibre is completely open source, licensed under the `GNU GPL v3 <https://www.gnu.org/licenses/gpl.html>`_.
 This means that you are free to download and modify the program to your heart's content. In this section,
 you will learn how to get a calibre development environment set up on the operating system of your choice.
 calibre is written primarily in `Python <https://www.python.org>`_ with some C/C++ code for speed and system interfacing.
diff --git a/manual/faq.rst b/manual/faq.rst
index e12efe503e..bf82e73548 100644
--- a/manual/faq.rst
+++ b/manual/faq.rst
@@ -486,7 +486,7 @@ Because of the large amount of spam in email, sending email can be tricky, as di
 The most common problem is if you are sending email directly (without a mail relay) in calibre. Many servers (for example, Amazon) block email
 that does not come from a well known relay. The most robust way to setup email sending in calibre is to do the following:
 
-  * Create a free GMX account at `GMX <http://www.gmx.com>`_.
+  * Create a free GMX account at `GMX <https://www.gmx.com>`_.
   * Goto :guilabel:`Preferences->Sharing by Email` in calibre and click the :guilabel:`Use GMX` button and fill in the information asked for.
   * calibre will then use GMX to send the mail.
   * If you are sending to your Kindle, remember to update the email preferences
diff --git a/manual/typesetting_math.rst b/manual/typesetting_math.rst
index 7b23d34930..30e24ea8b2 100644
--- a/manual/typesetting_math.rst
+++ b/manual/typesetting_math.rst
@@ -7,7 +7,7 @@ Typesetting Math in ebooks
 The calibre ebook viewer has the ability to display math embedded in ebooks (ePub
 and HTML files). You can typeset the math directly with TeX or MathML or
 AsciiMath. The calibre viewer uses the excellent `MathJax
-<http://www.mathjax.org>`_ library to do this. This is a brief tutorial on
+<https://www.mathjax.org>`_ library to do this. This is a brief tutorial on
 creating ebooks with math in them that work well with the calibre viewer.
 
 
diff --git a/manual/xpath.rst b/manual/xpath.rst
index 4805c84fb3..dda4241e8b 100644
--- a/manual/xpath.rst
+++ b/manual/xpath.rst
@@ -4,8 +4,8 @@ XPath Tutorial
 ==============
 
 In this tutorial, you will be given a gentle introduction to 
-`XPath <http://en.wikipedia.org/wiki/XPath>`_, a query language that can be 
-used to select arbitrary parts of `HTML <http://en.wikipedia.org/wiki/HTML>`_
+`XPath <https://en.wikipedia.org/wiki/XPath>`_, a query language that can be 
+used to select arbitrary parts of `HTML <https://en.wikipedia.org/wiki/HTML>`_
 documents in calibre. XPath is a widely
 used standard, and googling it will yield a ton of information. This tutorial, 
 however, focuses on using XPath for ebook related tasks like finding chapter