diff --git a/Overview.html b/Overview.html
index 1a3eb94cd..f4ff1048a 100644
--- a/Overview.html
+++ b/Overview.html
@@ -7,7 +7,7 @@
 
 <p><a class="logo" href="https://whatwg.org/"><img alt="WHATWG" height="100" src="https://resources.whatwg.org/logo-fetch.svg" width="100"></a>
 <h1 id="cors">Fetch</h1>
-<h2 class="no-num no-toc" id="living-standard-—-last-updated-10-april-2016">Living Standard — Last Updated 10 April 2016</h2>
+<h2 class="no-num no-toc" id="living-standard-—-last-updated-14-april-2016">Living Standard — Last Updated 14 April 2016</h2>
 
 <dl>
  <dt>Participate:
@@ -3912,7 +3912,8 @@ <h3 id="headers-class"><span class="secno">6.1 </span>Headers class</h3>
 <h3 id="body-mixin"><span class="secno">6.2 </span>Body mixin</h3>
 
 <pre class="idl">typedef any <dfn id="json">JSON</dfn>;
-typedef (<a class="external" data-anolis-spec="fileapi" href="https://w3c.github.io/FileAPI/#blob">Blob</a> or BufferSource or <a class="external" data-anolis-spec="xhr" href="https://xhr.spec.whatwg.org/#formdata">FormData</a> or <a class="external" data-anolis-spec="url" href="https://url.spec.whatwg.org/#urlsearchparams">URLSearchParams</a> or USVString) <dfn id="bodyinit">BodyInit</dfn>;</pre>
+typedef (<a class="external" data-anolis-spec="fileapi" href="https://w3c.github.io/FileAPI/#blob">Blob</a> or BufferSource or <a class="external" data-anolis-spec="xhr" href="https://xhr.spec.whatwg.org/#formdata">FormData</a> or <a class="external" data-anolis-spec="url" href="https://url.spec.whatwg.org/#urlsearchparams">URLSearchParams</a> or USVString) <dfn id="bodyinit">BodyInit</dfn>;
+typedef (<a href="#bodyinit">BodyInit</a> or <a href="#concept-readablestream" title="concept-ReadableStream">ReadableStream</a>) <dfn id="responsebodyinit">ResponseBodyInit</dfn>;</pre>
 
 <p>To <dfn id="concept-bodyinit-extract" title="concept-BodyInit-extract">extract</dfn> a <a href="#concept-body" title="concept-body">body</a> and a
 `<code title="">Content-Type</code>` <a href="#concept-header-value" title="concept-header-value">value</a> from
@@ -3977,6 +3978,9 @@ <h3 id="body-mixin"><span class="secno">6.2 </span>Body mixin</h3>
     <a class="external" data-anolis-spec="encoding" href="https://encoding.spec.whatwg.org/#utf-8-encode">utf-8 encode</a> on <var>object</var>.
 
     <p>Set <var>Content-Type</var> to `<code title="">text/plain;charset=UTF-8</code>`.
+
+   <dt><a href="#concept-readablestream"><code title="concept-ReadableStream">ReadableStream</code></a>
+   <dd><p>Set <var>stream</var> to <var>object</var>.
   </dl>
 
  <li>
@@ -4621,7 +4625,7 @@ <h3 id="request-class"><span class="secno">6.3 </span>Request class</h3>
 
 <h3 id="response-class"><span class="secno">6.4 </span>Response class</h3>
 
-<pre class="idl">[<a href="#dom-response" title="dom-Response">Constructor</a>(optional <a href="#bodyinit">BodyInit</a>? <var>body</var> = null, optional <a href="#responseinit">ResponseInit</a> <var>init</var>),
+<pre class="idl">[<a href="#dom-response" title="dom-Response">Constructor</a>(optional <a href="#responsebodyinit">ResponseBodyInit</a>? <var>body</var> = null, optional <a href="#responseinit">ResponseInit</a> <var>init</var>),
  Exposed=(Window,Worker)]
 interface <dfn id="response">Response</dfn> {
   [NewObject] static <a href="#response">Response</a> <a href="#dom-response-error" title="dom-Response-error">error</a>();
diff --git a/Overview.src.html b/Overview.src.html
index 709b8b350..2497d8d07 100644
--- a/Overview.src.html
+++ b/Overview.src.html
@@ -3842,7 +3842,8 @@ <h3>Headers class</h3>
 <h3>Body mixin</h3>
 
 <pre class=idl>typedef any <dfn>JSON</dfn>;
-typedef (<span data-anolis-spec=fileapi>Blob</span> or BufferSource or <span data-anolis-spec=xhr>FormData</span> or <span data-anolis-spec=url>URLSearchParams</span> or USVString) <dfn>BodyInit</dfn>;</pre>
+typedef (<span data-anolis-spec=fileapi>Blob</span> or BufferSource or <span data-anolis-spec=xhr>FormData</span> or <span data-anolis-spec=url>URLSearchParams</span> or USVString) <dfn>BodyInit</dfn>;
+typedef (<span>BodyInit</span> or <span title=concept-ReadableStream>ReadableStream</span>) <dfn>ResponseBodyInit</dfn>;</pre>
 
 <p>To <dfn title=concept-BodyInit-extract>extract</dfn> a <span title=concept-body>body</span> and a
 `<code title>Content-Type</code>` <span title=concept-header-value>value</span> from
@@ -3907,6 +3908,9 @@ <h3>Body mixin</h3>
     <span data-anolis-spec=encoding>utf-8 encode</span> on <var>object</var>.
 
     <p>Set <var>Content-Type</var> to `<code title>text/plain;charset=UTF-8</code>`.
+
+   <dt><code title=concept-ReadableStream>ReadableStream</code>
+   <dd><p>Set <var>stream</var> to <var>object</var>.
   </dl>
 
  <li>
@@ -4551,7 +4555,7 @@ <h3>Request class</h3>
 
 <h3>Response class</h3>
 
-<pre class=idl>[<span title=dom-Response>Constructor</span>(optional <span>BodyInit</span>? <var>body</var> = null, optional <span>ResponseInit</span> <var>init</var>),
+<pre class=idl>[<span title=dom-Response>Constructor</span>(optional <span>ResponseBodyInit</span>? <var>body</var> = null, optional <span>ResponseInit</span> <var>init</var>),
  Exposed=(Window,Worker)]
 interface <dfn>Response</dfn> {
   [NewObject] static <span>Response</span> <span title=dom-Response-error>error</span>();