diff --git a/book/source/21-resources.md b/book/source/21-resources.md
index 7df2b4b..ada1327 100644
--- a/book/source/21-resources.md
+++ b/book/source/21-resources.md
@@ -13,7 +13,7 @@ SPDX-License-Identifier: CC-BY-SA-4.0
 ## Web of Trust
 
 [PGP Web of Trust: Core Concepts Behind Trusted Communication](https://www.linux.com/training-tutorials/pgp-web-trust-core-concepts-behind-trusted-communication/),
-[PGP Web of Trust: Delegated Trust and Keyservers](https://web.archive.org/web/20210417113254/https://www.linuxfoundation.org/blog/pgp-web-of-trust-delegated-trust-and-keyservers/) [Konstantin Ryabitsev, 2014]
+[PGP Web of Trust: Delegated Trust and Keyservers](https://www.linuxfoundation.org/blog/pgp-web-of-trust-delegated-trust-and-keyservers/) [Konstantin Ryabitsev, 2014]
 
 [OpenPGP Web of Trust](https://sequoia-pgp.gitlab.io/sequoia-wot/) [Neal Walfield, 2022];
 implementation: <https://gitlab.com/sequoia-pgp/sequoia-wot/>.