diff --git a/community.json b/community.json
index 4c27144f..7cd7dd80 100644
--- a/community.json
+++ b/community.json
@@ -527,6 +527,12 @@
         "revision": "HEAD",
         "state": "working",
         "url": "https://github.com/YunoHost-Apps/h5ai_ynh"
+    },
+     "halcyon": {
+        "branch": "master",
+        "revision": "HEAD",
+        "state": "working",
+        "url": "https://github.com/YunoHost-Apps/halcyon_ynh"
     },
     "haste": {
         "branch": "master",