diff --git a/21-async/README.rst b/21-async/README.rst
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-Sample code for Chapter 22 - "Asynchronous programming"
+Sample code for Chapter 21 - "Asynchronous programming"
 
 From the book "Fluent Python, Second Edition" by Luciano Ramalho (O'Reilly, 2021)
 https://learning.oreilly.com/library/view/fluent-python-2nd/9781492056348/