diff --git a/content/overview/configuration.md b/content/overview/configuration.md
index a07ef5672..c492296fc 100644
--- a/content/overview/configuration.md
+++ b/content/overview/configuration.md
@@ -71,7 +71,7 @@ Here is a yaml configuration file which sets a few more options
 
 [Blackfriday](https://github.com/russross/blackfriday) is the [Markdown](http://daringfireball.net/projects/markdown/) rendering engine used in Hugo. The Blackfriday configuration in Hugo is mostly a set of sane defaults that should fit most use cases.
 
-But Hugo does expose some options---as listed in the table below, matched with the corresponding flag in the [Blackfriday source](https://github.com/russross/blackfriday/blob/master/html.go):
+But Hugo does expose some options---as listed in the table below, matched with the corresponding flag in the Blackfriday source ([html.go](https://github.com/russross/blackfriday/blob/master/html.go) and [markdown.go](https://github.com/russross/blackfriday/blob/master/markdown.go)):
 
 <table class="table table-bordered">
 <thead>
@@ -115,6 +115,16 @@ but only these three.</small></td>
 <td class="purpose-title">Purpose:</td>
 <td class="purpose-description" colspan="2">If <code>true</code>, then header and footnote IDs are generated without the document ID <small>(e.g.&nbsp;<code>#my-header</code> instead of <code>#my-header:bec3ed8ba720b9073ab75abcf3ba5d97</code>)</small></td>
 </tr>
+
+<tr>
+<td><code>extensions</code></td>
+<td><code>[]</code></td>
+<td><code>EXTENSION_*</code></td>
+</tr>
+<tr>
+<td class="purpose-title">Purpose:</td>
+<td class="purpose-description" colspan="2">Use non-default additional extensions <small>(e.g.&nbsp;Add <code>"hardLineBreak"</code> to use <code>EXTENSION_HARD_LINE_BREAK</code>)</small></td>
+</tr>
 </tbody>
 </table>
 
@@ -130,11 +140,14 @@ but only these three.</small></td>
   angledQuotes = true
   fractions = false
   plainIdAnchors = true
+  extensions = ["hardLineBreak"]
 </code></pre></td>
 <td><pre><code>blackfriday:
   angledQuotes: true
   fractions: false
   plainIdAnchors: true
+  extensions:
+    - hardLineBreak
 </code></pre></td>
 </tr>
 </table>