diff --git a/README.md b/README.md
index 99f69b8..6fb7de0 100644
--- a/README.md
+++ b/README.md
@@ -2014,7 +2014,7 @@ from collections import deque
 Threading
 ---------
 * **CPython interpreter can only run a single thread at a time.**
-* **That is why using multiple threads won't result in a faster execution, unless there is an I/O operation in at least one of them.**
+* **That is why using multiple threads won't result in a faster execution, unless one or more threads contain an I/O operation.**
 ```python
 from threading import Thread, RLock
 ```
diff --git a/index.html b/index.html
index 117e76f..82ede30 100644
--- a/index.html
+++ b/index.html
@@ -1778,7 +1778,7 @@ db = connector.connect(host=<str>, user=<str>, password=<str>,
 </code></pre>
 <div><h2 id="threading"><a href="#threading" name="threading">#</a>Threading</h2><ul>
 <li><strong>CPython interpreter can only run a single thread at a time.</strong></li>
-<li><strong>That is why using multiple threads won't result in a faster execution, unless there is an I/O operation in at least one of them.</strong></li>
+<li><strong>That is why using multiple threads won't result in a faster execution, unless one or more threads contain an I/O operation.</strong></li>
 </ul><pre><code class="python language-python hljs"><span class="hljs-keyword">from</span> threading <span class="hljs-keyword">import</span> Thread, RLock
 </code></pre></div>