diff --git a/numpydoc/linkcode.py b/numpydoc/linkcode.py
deleted file mode 100644
index 1ad3ab82..00000000
--- a/numpydoc/linkcode.py
+++ /dev/null
@@ -1,83 +0,0 @@
-# -*- coding: utf-8 -*-
-"""
-    linkcode
-    ~~~~~~~~
-
-    Add external links to module code in Python object descriptions.
-
-    :copyright: Copyright 2007-2011 by the Sphinx team, see AUTHORS.
-    :license: BSD, see LICENSE for details.
-
-"""
-from __future__ import division, absolute_import, print_function
-
-import warnings
-import collections
-
-warnings.warn("This extension has been accepted to Sphinx upstream. "
-              "Use the version from there (Sphinx >= 1.2) "
-              "https://bitbucket.org/birkenfeld/sphinx/pull-request/47/sphinxextlinkcode",
-              FutureWarning, stacklevel=1)
-
-
-from docutils import nodes
-
-from sphinx import addnodes
-from sphinx.locale import _
-from sphinx.errors import SphinxError
-
-class LinkcodeError(SphinxError):
-    category = "linkcode error"
-
-def doctree_read(app, doctree):
-    env = app.builder.env
-
-    resolve_target = getattr(env.config, 'linkcode_resolve', None)
-    if not isinstance(env.config.linkcode_resolve, collections.Callable):
-        raise LinkcodeError(
-            "Function `linkcode_resolve` is not given in conf.py")
-
-    domain_keys = dict(
-        py=['module', 'fullname'],
-        c=['names'],
-        cpp=['names'],
-        js=['object', 'fullname'],
-    )
-
-    for objnode in doctree.traverse(addnodes.desc):
-        domain = objnode.get('domain')
-        uris = set()
-        for signode in objnode:
-            if not isinstance(signode, addnodes.desc_signature):
-                continue
-
-            # Convert signode to a specified format
-            info = {}
-            for key in domain_keys.get(domain, []):
-                value = signode.get(key)
-                if not value:
-                    value = ''
-                info[key] = value
-            if not info:
-                continue
-
-            # Call user code to resolve the link
-            uri = resolve_target(domain, info)
-            if not uri:
-                # no source
-                continue
-
-            if uri in uris or not uri:
-                # only one link per name, please
-                continue
-            uris.add(uri)
-
-            onlynode = addnodes.only(expr='html')
-            onlynode += nodes.reference('', '', internal=False, refuri=uri)
-            onlynode[0] += nodes.inline('', _('[source]'),
-                                        classes=['viewcode-link'])
-            signode += onlynode
-
-def setup(app):
-    app.connect('doctree-read', doctree_read)
-    app.add_config_value('linkcode_resolve', None, '')
diff --git a/numpydoc/tests/test_linkcode.py b/numpydoc/tests/test_linkcode.py
deleted file mode 100644
index 340166a4..00000000
--- a/numpydoc/tests/test_linkcode.py
+++ /dev/null
@@ -1,5 +0,0 @@
-from __future__ import division, absolute_import, print_function
-
-import numpydoc.linkcode
-
-# No tests at the moment...
diff --git a/setup.py b/setup.py
index 20d94ebf..b21e82bd 100644
--- a/setup.py
+++ b/setup.py
@@ -37,7 +37,7 @@
     author_email="pav@iki.fi",
     url="https://github.com/numpy/numpy/blob/master/doc/HOWTO_DOCUMENT.rst.txt",
     license="BSD",
-    install_requires=["sphinx >= 1.0.1", 'Jinja2>=2.3'],
+    install_requires=["sphinx >= 1.2.3", 'Jinja2>=2.3'],
     package_data={'numpydoc': ['tests/test_*.py', 'templates/*.rst']},
     test_suite = 'nose.collector',
     cmdclass={"sdist": sdist},