diff --git a/docs/source/development/index.rst b/docs/source/development/index.rst
index a945625..389fdea 100644
--- a/docs/source/development/index.rst
+++ b/docs/source/development/index.rst
@@ -19,4 +19,4 @@ Developer's guide for third party tools and libraries
    lexer
    pycompat
    config
-   inputhook_app
\ No newline at end of file
+   inputhook_app
diff --git a/docs/source/development/wrapperkernels.rst b/docs/source/development/wrapperkernels.rst
index f6e308b..65f3a1e 100644
--- a/docs/source/development/wrapperkernels.rst
+++ b/docs/source/development/wrapperkernels.rst
@@ -7,7 +7,7 @@ You can now re-use the kernel machinery in IPython to easily make new kernels.
 This is useful for languages that have Python bindings, such as `Octave
 <http://www.gnu.org/software/octave/>`_ (via
 `Oct2Py <http://blink1073.github.io/oct2py/docs/index.html>`_), or languages
-where the REPL can be controlled in a tty using `pexpect <http://pexpect.readthedocs.org/en/latest/>`_,
+where the REPL can be controlled in a tty using `pexpect <http://pexpect.readthedocs.io/en/latest/>`_,
 such as bash.
 
 .. seealso::
diff --git a/docs/source/index.rst b/docs/source/index.rst
index fc948f1..7b4625e 100644
--- a/docs/source/index.rst
+++ b/docs/source/index.rst
@@ -27,10 +27,10 @@ Contents
 
 .. seealso::
 
-   `Jupyter documentation <http://jupyter.readthedocs.org/en/latest/>`__
+   `Jupyter documentation <http://jupyter.readthedocs.io/en/latest/>`__
      The Notebook code and many other pieces formerly in IPython are now parts
      of Project Jupyter.
-   `ipyparallel documentation <http://ipyparallel.readthedocs.org/en/latest/>`__
+   `ipyparallel documentation <http://ipyparallel.readthedocs.io/en/latest/>`__
      Formerly ``IPython.parallel``.
 
 
diff --git a/docs/source/install/install.rst b/docs/source/install/install.rst
index 249aaa5..c2895f6 100644
--- a/docs/source/install/install.rst
+++ b/docs/source/install/install.rst
@@ -2,7 +2,7 @@ IPython requires Python 2.7 or ≥ 3.3.
 
 .. seealso::
 
-   `Installing Jupyter <http://jupyter.readthedocs.org/en/latest/install.html>`__
+   `Installing Jupyter <http://jupyter.readthedocs.io/en/latest/install.html>`__
      The Notebook, nbconvert, and many other former pieces of IPython are now
      part of Project Jupyter.
 
diff --git a/docs/source/interactive/index.rst b/docs/source/interactive/index.rst
index 3441c70..26c393d 100644
--- a/docs/source/interactive/index.rst
+++ b/docs/source/interactive/index.rst
@@ -15,4 +15,4 @@ Using IPython for interactive work
 .. seealso::
 
     `A Qt Console for Jupyter <http://jupyter.org/qtconsole/>`__
-    `The Jupyter Notebook <http://jupyter-notebook.readthedocs.org/en/latest/>`__
+    `The Jupyter Notebook <http://jupyter-notebook.readthedocs.io/en/latest/>`__
diff --git a/docs/source/overview.rst b/docs/source/overview.rst
index 7d4b8b0..a81604d 100644
--- a/docs/source/overview.rst
+++ b/docs/source/overview.rst
@@ -219,7 +219,7 @@ different numbers which correspond to the Process ID of the kernel.
 
 You can read more about using `ipython qtconsole 
 <http://jupyter.org/qtconsole/>`_, and
-`ipython notebook <http://jupyter-notebook.readthedocs.org/en/latest/>`_. There 
+`ipython notebook <http://jupyter-notebook.readthedocs.io/en/latest/>`_. There 
 is also a :ref:`message spec <messaging>` which documents the protocol for 
 communication between kernels
 and clients.
diff --git a/docs/source/whatsnew/github-stats-1.0.rst b/docs/source/whatsnew/github-stats-1.0.rst
index 05bdbde..d0b1ae1 100644
--- a/docs/source/whatsnew/github-stats-1.0.rst
+++ b/docs/source/whatsnew/github-stats-1.0.rst
@@ -1000,7 +1000,7 @@ Pull Requests (793):
 * :ghpull:`2274`: CLN: Use name to id mapping of notebooks instead of searching.
 * :ghpull:`2270`: SSHLauncher tweaks
 * :ghpull:`2269`: add missing location when disambiguating controller IP
-* :ghpull:`2263`: Allow docs to build on http://readthedocs.org/
+* :ghpull:`2263`: Allow docs to build on http://readthedocs.io/
 * :ghpull:`2256`: Adding data publication example notebook.
 * :ghpull:`2255`: better flush iopub with AsyncResults
 * :ghpull:`2261`: Fix: longest_substr([]) -> ''
diff --git a/docs/source/whatsnew/version4.rst b/docs/source/whatsnew/version4.rst
index d8ec8dc..6150a86 100644
--- a/docs/source/whatsnew/version4.rst
+++ b/docs/source/whatsnew/version4.rst
@@ -47,8 +47,8 @@ Released August, 2015
 
 IPython 4.0 is the first major release after the Big Split.
 IPython no longer contains the notebook, qtconsole, etc. which have moved to
-`jupyter <https://jupyter.readthedocs.org>`_.
-IPython subprojects, such as `IPython.parallel <https://ipyparallel.readthedocs.org>`_ and `widgets <https://ipywidgets.readthedocs.org>`_ have moved to their own repos as well.
+`jupyter <https://jupyter.readthedocs.io>`_.
+IPython subprojects, such as `IPython.parallel <https://ipyparallel.readthedocs.io>`_ and `widgets <https://ipywidgets.readthedocs.io>`_ have moved to their own repos as well.
 
 The following subpackages are deprecated: