diff --git a/doc/Changelog.html b/doc/Changelog.html
index 46234c37..13c8c117 100644
--- a/doc/Changelog.html
+++ b/doc/Changelog.html
@@ -34,7 +34,7 @@
 <nav id="TOC">
 <ul>
 <li><a href="#lamexp-v4.xx-history"><span class="toc-section-number">1</span> LameXP v4.xx History</a><ul>
-<li><a href="#lamexp-v4.12-xxxx-xx-xx">LameXP v4.12 [xxxx-xx-xx]</a></li>
+<li><a href="#lamexp-v4.12-2015-10-23">LameXP v4.12 [2015-10-23]</a></li>
 <li><a href="#lamexp-v4.11-2015-04-05">LameXP v4.11 [2015-04-05]</a></li>
 <li><a href="#lamexp-v4.10-2014-06-23">LameXP v4.10 [2014-06-23]</a></li>
 <li><a href="#lamexp-v4.09-2014-01-26">LameXP v4.09 [2014-01-26]</a></li>
@@ -80,10 +80,11 @@
 </ul>
 </nav>
 <h1 id="lamexp-v4.xx-history"><span class="header-section-number">1</span> LameXP v4.xx History</h1>
-<h2 id="lamexp-v4.12-xxxx-xx-xx" class="unnumbered">LameXP v4.12 [xxxx-xx-xx]</h2>
+<h2 id="lamexp-v4.12-2015-10-23" class="unnumbered">LameXP v4.12 [2015-10-23]</h2>
 <ul>
 <li>Upgraded build environment to Microsoft Visual Studio 2013 with Update-5<br /></li>
 <li>Updated Qt runtime libraries to v4.8.7 Final (2015-05-25), compiled with MSVC 12.0<br /></li>
+<li>Added support for building LameXP and MUtilities with Visual Studio 2015<br /></li>
 <li>Added Hungarian translation, contributed by Zityi's Translator Team &lt;<script type="text/javascript">
 <!--
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@@ -108,7 +109,8 @@ document.write('<a h'+'ref'+'="ma'+'ilto'+':'+e+'">'+e+'<\/'+'a'+'>');
 <li>QAAC encoder is now using <code>--cvbr</code> instead of <code>--abr</code> when &quot;ABR&quot; mode is selected<br /></li>
 <li>Enable the embedding of cover artwork for Opus encoder (opusenc), using the <code>--picture</code> option<br /></li>
 <li>Some installer improvements have been implemented (especially in &quot;update&quot; mode)<br /></li>
-<li>Full support for Windows 10 RTM (Build #10240)</li>
+<li>Full support for Windows 10 RTM (Build #10240)<br /></li>
+<li>Updated language files (big thank-you to all contributors !!!)</li>
 </ul>
 <h2 id="lamexp-v4.11-2015-04-05" class="unnumbered">LameXP v4.11 [2015-04-05]</h2>
 <ul>
diff --git a/doc/Changelog.md b/doc/Changelog.md
index 335d61eb..a87d0eaa 100644
--- a/doc/Changelog.md
+++ b/doc/Changelog.md
@@ -2,10 +2,11 @@
 
 # LameXP v4.xx History #
 
-## LameXP v4.12 [xxxx-xx-xx] ## {-}
+## LameXP v4.12 [2015-10-23] ## {-}
 
 * Upgraded build environment to Microsoft Visual Studio 2013 with Update-5
 * Updated Qt runtime libraries to v4.8.7 Final (2015-05-25), compiled with MSVC 12.0
+* Added support for building LameXP and MUtilities with Visual Studio 2015
 * Added Hungarian translation, contributed by Zityi's Translator Team <<zityisoft@gmail.com>>
 * Added optional support for the *libfdk-aac* encoder, using the [fdkaac](https://github.com/nu774/fdkaac) front-end by nu774
 * Added detection of the *64-Bit* version of QAAC encoder, requires 64-Bit Apple Application Support
@@ -26,6 +27,7 @@
 * Enable the embedding of cover artwork for Opus encoder (opusenc), using the ``--picture`` option
 * Some installer improvements have been implemented (especially in "update" mode)
 * Full support for Windows 10 RTM (Build #10240)
+* Updated language files (big thank-you to all contributors !!!)
 
 
 ## LameXP v4.11 [2015-04-05] ## {-}