diff --git a/README.md b/README.md
index 8d619a9..6538b50 100644
--- a/README.md
+++ b/README.md
@@ -1286,7 +1286,7 @@ class MySequence:
### ABC Sequence
* **It's a richer interface than the basic sequence.**
* **Extending it generates iter(), contains(), reversed(), index() and count().**
-* **Unlike `'abc.Iterable'` and `'abc.Collection'`, it is not a duck type. That is why `'issubclass(MySequence, abc.Sequence)'` would return False even if MySequence had all the methods defined.**
+* **Unlike `'abc.Iterable'` and `'abc.Collection'`, it is not a duck type. That is why `'issubclass(MySequence, abc.Sequence)'` would return False even if MySequence had all the methods defined. It however recognizes any list, tuple, range, str, bytes, bytearray and memoryview, because they are registered as Sequence's virtual subclasses.**
```python
from collections import abc
diff --git a/index.html b/index.html
index c28a2c3..aa72eaa 100644
--- a/index.html
+++ b/index.html
@@ -54,7 +54,7 @@
<body>
<header>
- <aside>June 10, 2022</aside>
+ <aside>June 11, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</header>
@@ -1109,7 +1109,7 @@ Hello World!
<div><h3 id="abcsequence">ABC Sequence</h3><ul>
<li><strong>It's a richer interface than the basic sequence.</strong></li>
<li><strong>Extending it generates iter(), contains(), reversed(), index() and count().</strong></li>
-<li><strong>Unlike <code class="python hljs"><span class="hljs-string">'abc.Iterable'</span></code> and <code class="python hljs"><span class="hljs-string">'abc.Collection'</span></code>, it is not a duck type. That is why <code class="python hljs"><span class="hljs-string">'issubclass(MySequence, abc.Sequence)'</span></code> would return False even if MySequence had all the methods defined.</strong></li>
+<li><strong>Unlike <code class="python hljs"><span class="hljs-string">'abc.Iterable'</span></code> and <code class="python hljs"><span class="hljs-string">'abc.Collection'</span></code>, it is not a duck type. That is why <code class="python hljs"><span class="hljs-string">'issubclass(MySequence, abc.Sequence)'</span></code> would return False even if MySequence had all the methods defined. It however recognizes any list, tuple, range, str, bytes, bytearray and memoryview, because they are registered as Sequence's virtual subclasses.</strong></li>
</ul><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> collections <span class="hljs-keyword">import</span> abc
<span class="hljs-class"><span class="hljs-keyword">class</span> <span class="hljs-title">MyAbcSequence</span><span class="hljs-params">(abc.Sequence)</span>:</span>
@@ -2901,7 +2901,7 @@ $ pyinstaller script.py --add-data '<path>:.' <span class="hljs-comment">
<footer>
- <aside>June 10, 2022</aside>
+ <aside>June 11, 2022</aside>
<a href="https://gto76.github.io" rel="author">Jure Šorn</a>
</footer>