diff --git a/conf/app.src b/conf/app.src
index 24ad348..38bebb7 100644
--- a/conf/app.src
+++ b/conf/app.src
@@ -1,5 +1,5 @@
-SOURCE_URL=https://github.com/tootsuite/mastodon/archive/refs/tags/v4.2.1.tar.gz
-SOURCE_SUM=08e3668ddf44774d7165af4dbe1ee3deae1e935481d7365fc7df0a00af806836
+SOURCE_URL=https://github.com/tootsuite/mastodon/archive/refs/tags/v4.2.3.tar.gz
+SOURCE_SUM=328ced93a073e775c355956ea298f5796be5af7f584442fdd8e65190117c631f
 SOURCE_SUM_PRG=sha256sum
 SOURCE_FORMAT=tar.gz
 SOURCE_IN_SUBDIR=true
diff --git a/manifest.json b/manifest.json
index 437f16c..7be81fc 100644
--- a/manifest.json
+++ b/manifest.json
@@ -6,7 +6,7 @@
         "en": "Libre and federated social network",
         "fr": "Réseau social libre et fédéré"
     },
-    "version": "4.2.1~ynh1",
+    "version": "4.2.3~ynh1",
     "url": "https://github.com/mastodon/mastodon",
     "upstream": {
         "license": "AGPL-3.0-or-later",