diff --git a/community.json b/community.json
index 69290933..92124011 100644
--- a/community.json
+++ b/community.json
@@ -287,6 +287,12 @@
         "state": "working",
         "url": "https://github.com/kemenaran/yunohost-lets-chat"
     },
+    "letsencrypt": {
+        "branch": "master",
+        "revision": "e498e05ebfc52880992507988571d24c35a3cd4c",
+        "state": "inprogress",
+        "url": "https://github.com/alexAubin/letsencrypt_ynh"
+    },
     "limesurvey": {
         "branch": "master",
         "revision": "c927cce4e76c4bd935e71fca2c11d03524bea332",
@@ -311,6 +317,12 @@
         "state": "inprogress",
         "url": "https://github.com/titoko/lychee_ynh"
     },
+    "mailman": {
+        "branch": "master",
+        "revision": "515964362eed2b438cc45ea8c55647853ea364f0",
+        "state": "inprogress",
+        "url": "https://github.com/alexAubin/mailman_ynh"
+    },
     "mediagoblin": {
         "branch": "master",
         "revision": "e516845becf6fa640b2dd7de5b9cb36e89be0ae1",