diff --git a/README.md b/README.md
index e888146..f1131fc 100644
--- a/README.md
+++ b/README.md
@@ -263,6 +263,8 @@ Emoji's for each entry provide additional information on project status:
 
 * [**Dokie.li**](https://github.com/linkeddata/dokieli) ([site](https://dokie.li)): Article authoring and formating `Apache-2.0, JavaScript`
 
+* [**Elgg**](https://github.com/Elgg/Elgg) ([site](https://elgg.org)): Powerful open source social networking engine. [ActivityPub plugin for Elgg](https://elgg.org/plugins/3330966). `GPLv2, PHP`
+
 * [**Ghost**](https://github.com/tryghost/ghost) ([site](https://activitypub.ghost.org)): Independent technology for modern publishing, memberships, subscriptions and newsletters. `MIT, JavaScript`
 
 * [**Gimli**](https://codeberg.org/Laxystem/Gimli/): Federated end-to-end-encrypted guild-based messaging app & blogging platform. `MPL-2.0, Kotlin`