diff --git a/docs/docs/user/known-instances.md b/docs/docs/user/known-instances.md
index df5b4db..1225e19 100644
--- a/docs/docs/user/known-instances.md
+++ b/docs/docs/user/known-instances.md
@@ -29,8 +29,13 @@ This page contains a non-exhaustive list with all websites using Anubis.
 - https://wiki.archlinux.org/
 - https://git.devuan.org/
 - https://hydra.nixos.org/
-- https://hydra.nixos.org/
 - https://codeberg.org/
+- <details>
+  <summary>Sourceware</summary>
+  - https://sourceware.org/glibc/wiki
+  - https://builder.sourceware.org/testruns/
+  - https://patchwork.sourceware.org/
+  </details>
 - <details>
   <summary>The United Nations</summary>
   - https://policytoolbox.iiep.unesco.org/