diff --git a/ChangeLog.rst b/ChangeLog.rst
index 7d9a00e4..ce0406a9 100644
--- a/ChangeLog.rst
+++ b/ChangeLog.rst
@@ -1,5 +1,5 @@
-4.1.0 - TBD
------------
+4.1.0 - 2017-12-20
+------------------
 
 * Added ``fmt::to_wstring()`` in addition to ``fmt::to_string()`` (`#559 <https://github.com/fmtlib/fmt/pull/559>`_). Thanks `@alabuzhev (Alex Alabuzhev) <https://github.com/alabuzhev>`_.
 
diff --git a/doc/build.py b/doc/build.py
index 22e734ca..cb8d0c3c 100755
--- a/doc/build.py
+++ b/doc/build.py
@@ -6,7 +6,7 @@ import errno, os, shutil, sys, tempfile
 from subprocess import check_call, check_output, CalledProcessError, Popen, PIPE
 from distutils.version import LooseVersion
 
-versions = ['1.0.0', '1.1.0', '2.0.0', '3.0.2', '4.0.0']
+versions = ['1.0.0', '1.1.0', '2.0.0', '3.0.2', '4.0.0', '4.1.0']
 
 def pip_install(package, commit=None, **kwargs):
   "Install package using pip."