diff --git a/Doc/howto/pyporting.rst b/Doc/howto/pyporting.rst
index f7d12a1..1543823 100644
--- a/Doc/howto/pyporting.rst
+++ b/Doc/howto/pyporting.rst
@@ -125,7 +125,7 @@
 Python 3! But to fully understand how your code is going to change and what
 you want to look out for while you code, you will want to learn what changes
 Python 3 makes in terms of Python 2. Typically the two best ways of doing that
-is reading the `"What's New"`_ doc for each release of Python 3 and the
+is reading the :ref:`"What's New" <whatsnew-index>` doc for each release of Python 3 and the
 `Porting to Python 3`_ book (which is free online). There is also a handy
 `cheat sheet`_ from the Python-Future project.
 
@@ -308,10 +308,10 @@
 against Python 2 and not Python 3. To help explain this, let's look at an
 example.
 
-Let's pretend that you need access to a feature of importlib_ that
+Let's pretend that you need access to a feature of :mod:`importlib` that
 is available in Python's standard library since Python 3.3 and available for
 Python 2 through importlib2_ on PyPI. You might be tempted to write code to
-access e.g. the ``importlib.abc`` module by doing the following::
+access e.g. the :mod:`importlib.abc` module by doing the following::
 
   import sys
 
@@ -432,12 +432,10 @@
 to make sure everything functions as expected in both versions of Python.
 
 
-.. _2to3: https://docs.python.org/3/library/2to3.html
 .. _caniusepython3: https://pypi.org/project/caniusepython3
 .. _cheat sheet: http://python-future.org/compatible_idioms.html
 .. _coverage.py: https://pypi.org/project/coverage
 .. _Futurize: http://python-future.org/automatic_conversion.html
-.. _importlib: https://docs.python.org/3/library/importlib.html#module-importlib
 .. _importlib2: https://pypi.org/project/importlib2
 .. _Modernize: https://python-modernize.readthedocs.io/
 .. _mypy: http://mypy-lang.org/
@@ -453,6 +451,4 @@
 .. _tox: https://pypi.org/project/tox
 .. _trove classifier: https://pypi.org/classifiers
 
-.. _"What's New": https://docs.python.org/3/whatsnew/index.html
-
 .. _Why Python 3 exists: https://snarky.ca/why-python-3-exists