diff --git a/book/source/01-intro.md b/book/source/01-intro.md
index c9151fb..86e8c2f 100644
--- a/book/source/01-intro.md
+++ b/book/source/01-intro.md
@@ -5,9 +5,9 @@ SPDX-License-Identifier: CC-BY-SA-4.0
 
 # Introducing OpenPGP
 
-This documentation project is designed to provide a comprehensive understanding of OpenPGP, highlighting its functionalities and applications for software developers. While this document predominantly references [OpenPGP version 6, as outlined in the latest RFC](https://datatracker.ietf.org/doc/draft-ietf-openpgp-crypto-refresh/), it is important to note that the fundamental principles and functionalities of OpenPGP have remained consistent across its versions since its major release in 1998.
+This documentation project is designed to provide a comprehensive understanding of OpenPGP, highlighting its functionalities and applications for software developers. While this document predominantly references [OpenPGP version 6, as outlined in the latest RFC](https://datatracker.ietf.org/doc/draft-ietf-openpgp-crypto-refresh/), it is important to note that the fundamental principles and functionalities of OpenPGP have remained consistent across its versions since its first release as an open standard in RFC 2440 in 1998.
 
-This documentation project seeks to introduce all  OpenPGP concepts and functionalities to application developers who wish to use it in their projects.
+This documentation project seeks to introduce all OpenPGP concepts and functionalities to application developers who wish to use it in their projects.
 
 ## What is OpenPGP?