diff --git a/conf/app.src b/conf/app.src
index b957ecb..dbf6513 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/tootsuite/mastodon/archive/refs/tags/v3.5.3.tar.gz
-SOURCE_SUM=ad6f71419538a9427669010735bcf029e9e2f455b6728d498b27bf38285bf3f8
+SOURCE_URL=https://github.com/tootsuite/mastodon/archive/refs/tags/v4.0.2.tar.gz
+SOURCE_SUM=70a4d9dcd9b746f6e9ced9b567ee5ad81e530cfaccb7f471259b917c20166309
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
diff --git a/manifest.json b/manifest.json
index d63a402..d5abdd0 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Libre and federated social network",
         "fr": "Réseau social libre et fédéré"
     },
-    "version": "3.5.3~ynh4",
+    "version": "4.0.2~ynh1",
     "url": "https://github.com/mastodon/mastodon",
     "upstream": {
         "license": "AGPL-3.0-or-later",