use theme provided by pallets-sphinx-themes

docs/patterns/caching.rst

@@ -27,7 +27,7 @@ cache that keeps the item stored in the memory of the Python interpreter::
     cache = SimpleCache()
 
 If you want to use memcached, make sure to have one of the memcache modules
-supported (you get them from `PyPI <https://pypi.python.org/pypi>`_) and a
+supported (you get them from `PyPI <https://pypi.org/>`_) and a
 memcached server running somewhere.  This is how you connect to such an
 memcached server then::
 

docs/patterns/distribute.rst

@@ -173,5 +173,5 @@ folder instead of copying the data over.  You can then continue to work on
 the code without having to run ``install`` again after each change.
 
 
-.. _pip: https://pypi.python.org/pypi/pip
-.. _Setuptools: https://pypi.python.org/pypi/setuptools
+.. _pip: https://pypi.org/project/pip/
+.. _Setuptools: https://pypi.org/project/setuptools/

docs/patterns/sqlalchemy.rst

@@ -20,7 +20,7 @@ there is a Flask extension that handles that for you.  This is recommended
 if you want to get started quickly.
 
 You can download `Flask-SQLAlchemy`_ from `PyPI
-<https://pypi.python.org/pypi/Flask-SQLAlchemy>`_.
+<https://pypi.org/project/Flask-SQLAlchemy/>`_.
 
 .. _Flask-SQLAlchemy: http://flask-sqlalchemy.pocoo.org/
 

docs/patterns/wtforms.rst

@@ -17,7 +17,7 @@ forms.
    The `Flask-WTF`_ extension expands on this pattern and adds a
    few little helpers that make working with forms and Flask more
    fun.  You can get it from `PyPI
-   <https://pypi.python.org/pypi/Flask-WTF>`_.
+   <https://pypi.org/project/Flask-WTF/>`_.
 
 .. _Flask-WTF: https://flask-wtf.readthedocs.io/en/stable/