diff --git a/README.md b/README.md
index bbc123b..69c2166 100644
--- a/README.md
+++ b/README.md
@@ -143,7 +143,7 @@ Tuple
 ```python
 <tuple> = ()
 <tuple> = (<el>, )
-<tuple> = (<el_1>, <el_2>, ...)
+<tuple> = (<el_1>, <el_2> [, ...])
 ```
 
 ### Named Tuple
diff --git a/index.html b/index.html
index f68fc36..4ed0d9d 100644
--- a/index.html
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@@ -309,7 +309,7 @@ Counter({<span class="hljs-string">'blue'</span>: <span class="hljs-number">3</s
 
 <div><h2 id="tuple"><a href="#tuple" name="tuple">#</a>Tuple</h2><p><strong>Tuple is an immutable and hashable list.</strong></p><pre><code class="python language-python hljs">&lt;tuple&gt; = ()
 &lt;tuple&gt; = (&lt;el&gt;, )
-&lt;tuple&gt; = (&lt;el_1&gt;, &lt;el_2&gt;, ...)
+&lt;tuple&gt; = (&lt;el_1&gt;, &lt;el_2&gt; [, ...])
 </code></pre></div>