diff --git a/doc/tutorials/dart.rst b/doc/tutorials/dart.rst
index a660e9983..0cd9109f4 100644
--- a/doc/tutorials/dart.rst
+++ b/doc/tutorials/dart.rst
@@ -11,7 +11,7 @@ This is a instruction of new tree booster ``dart``.
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 Original paper
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-Rashmi Korlakai Vinayak, Ran Gilad-Bachrach. "DART: Dropouts meet Multiple Additive Regression Trees." `JMLR <http://www.jmlr.org/proceedings/papers/v38/korlakaivinayak15.pdf>`_.
+Rashmi Korlakai Vinayak, Ran Gilad-Bachrach. "DART: Dropouts meet Multiple Additive Regression Trees." [`PMLR <http://proceedings.mlr.press/v38/korlakaivinayak15.pdf>`_, `arXiv <https://arxiv.org/abs/1505.01866>`_].
 
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 Features