diff --git a/Doc/howto/functional.rst b/Doc/howto/functional.rst
index 6330be5..80ff710 100644
--- a/Doc/howto/functional.rst
+++ b/Doc/howto/functional.rst
@@ -1225,9 +1225,9 @@
 
 Mertz also wrote a 3-part series of articles on functional programming
 for IBM's DeveloperWorks site; see
-`part 1 <http://www.ibm.com/developerworks/linux/library/l-prog/index.html>`__,
-`part 2 <http://www.ibm.com/developerworks/linux/library/l-prog2/index.html>`__, and
-`part 3 <http://www.ibm.com/developerworks/linux/library/l-prog3/index.html>`__,
+`part 1 <https://www.ibm.com/developerworks/linux/library/l-prog/index.html>`__,
+`part 2 <https://www.ibm.com/developerworks/linux/library/l-prog2/index.html>`__, and
+`part 3 <https://www.ibm.com/developerworks/linux/library/l-prog3/index.html>`__,
 
 
 Python documentation
diff --git a/Doc/howto/logging-cookbook.rst b/Doc/howto/logging-cookbook.rst
index 5cde2c7..57b4333 100644
--- a/Doc/howto/logging-cookbook.rst
+++ b/Doc/howto/logging-cookbook.rst
@@ -1634,11 +1634,11 @@
 Inserting a BOM into messages sent to a SysLogHandler
 -----------------------------------------------------
 
-`RFC 5424 <http://tools.ietf.org/html/rfc5424>`_ requires that a
+`RFC 5424 <https://tools.ietf.org/html/rfc5424>`_ requires that a
 Unicode message be sent to a syslog daemon as a set of bytes which have the
 following structure: an optional pure-ASCII component, followed by a UTF-8 Byte
 Order Mark (BOM), followed by Unicode encoded using UTF-8. (See the `relevant
-section of the specification <http://tools.ietf.org/html/rfc5424#section-6>`_.)
+section of the specification <https://tools.ietf.org/html/rfc5424#section-6>`_.)
 
 In Python 3.1, code was added to
 :class:`~logging.handlers.SysLogHandler` to insert a BOM into the message, but
diff --git a/Doc/howto/pyporting.rst b/Doc/howto/pyporting.rst
index 621d901..c6fc03e 100644
--- a/Doc/howto/pyporting.rst
+++ b/Doc/howto/pyporting.rst
@@ -427,10 +427,10 @@
 .. _Futurize: http://python-future.org/automatic_conversion.html
 .. _importlib: https://docs.python.org/3/library/importlib.html#module-importlib
 .. _importlib2: https://pypi.python.org/pypi/importlib2
-.. _Modernize: http://python-modernize.readthedocs.org/en/latest/
+.. _Modernize: https://python-modernize.readthedocs.org/en/latest/
 .. _Porting to Python 3: http://python3porting.com/
 .. _Pylint: https://pypi.python.org/pypi/pylint
-.. _Python 3 Q & A: http://ncoghlan-devs-python-notes.readthedocs.org/en/latest/python3/questions_and_answers.html
+.. _Python 3 Q & A: https://ncoghlan-devs-python-notes.readthedocs.org/en/latest/python3/questions_and_answers.html
 
 .. _python-future: http://python-future.org/
 .. _python-porting: https://mail.python.org/mailman/listinfo/python-porting
diff --git a/Doc/howto/unicode.rst b/Doc/howto/unicode.rst
index 8776e3c..24051bf 100644
--- a/Doc/howto/unicode.rst
+++ b/Doc/howto/unicode.rst
@@ -214,7 +214,7 @@
 origin and development of Unicode is also available on the site.
 
 To help understand the standard, Jukka Korpela has written `an introductory
-guide <http://www.cs.tut.fi/~jkorpela/unicode/guide.html>`_ to reading the
+guide <https://www.cs.tut.fi/~jkorpela/unicode/guide.html>`_ to reading the
 Unicode character tables.
 
 Another `good introductory article <http://www.joelonsoftware.com/articles/Unicode.html>`_
diff --git a/Doc/howto/urllib2.rst b/Doc/howto/urllib2.rst
index 0d04c9f..b4e2157 100644
--- a/Doc/howto/urllib2.rst
+++ b/Doc/howto/urllib2.rst
@@ -122,7 +122,7 @@
 
 Note that other encodings are sometimes required (e.g. for file upload from HTML
 forms - see `HTML Specification, Form Submission
-<http://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13>`_ for more
+<https://www.w3.org/TR/REC-html40/interact/forms.html#h-17.13>`_ for more
 details).
 
 If you do not pass the ``data`` argument, urllib uses a **GET** request. One
@@ -403,7 +403,7 @@
 :class:`http.client.HTTPMessage` instance.
 
 Typical headers include 'Content-length', 'Content-type', and so on. See the
-`Quick Reference to HTTP Headers <http://www.cs.tut.fi/~jkorpela/http.html>`_
+`Quick Reference to HTTP Headers <https://www.cs.tut.fi/~jkorpela/http.html>`_
 for a useful listing of HTTP headers with brief explanations of their meaning
 and use.
 
@@ -586,5 +586,5 @@
        scripts with a localhost server, I have to prevent urllib from using
        the proxy.
 .. [#] urllib opener for SSL proxy (CONNECT method): `ASPN Cookbook Recipe
-       <http://code.activestate.com/recipes/456195/>`_.
+       <https://code.activestate.com/recipes/456195/>`_.