diff --git a/doc/contrib/docs.rst b/doc/contrib/docs.rst
index 538428c0a..04de8d843 100644
--- a/doc/contrib/docs.rst
+++ b/doc/contrib/docs.rst
@@ -19,7 +19,7 @@ Documents
 
   make html
 
-inside the ``doc/`` directory.
+inside the ``doc/`` directory.  The online document is hosted by `Read the Docs <https://readthedocs.org/>`__ where the imported project is managed by `Hyunsu Cho <https://github.com/hcho3>`__ and `Jiaming Yuan <https://github.com/trivialfis>`__.
 
 ********
 Examples
diff --git a/doc/contrib/release.rst b/doc/contrib/release.rst
index 5eb31b76a..6b47a38d0 100644
--- a/doc/contrib/release.rst
+++ b/doc/contrib/release.rst
@@ -30,7 +30,7 @@ Making a Release
 5. Make a release on GitHub tag page, which might be done with previous step if the tag is created on GitHub.
 6. Submit pip, CRAN, and Maven packages.
 
-   + The pip package is maintained by `Hyunsu Cho <https://github.com/hcho3>`_ and `Jiaming Yuan <https://github.com/trivialfis>`_.  There's a helper script for downloading pre-built wheels  and R packages ``xgboost/dev/release-pypi-r.py`` along with simple instructions for using ``twine``.
+   + The pip package is maintained by `Hyunsu Cho <https://github.com/hcho3>`__ and `Jiaming Yuan <https://github.com/trivialfis>`__.  There's a helper script for downloading pre-built wheels  and R packages ``xgboost/dev/release-pypi-r.py`` along with simple instructions for using ``twine``.
 
    + The CRAN package is maintained by `Tong He <https://github.com/hetong007>`_.