diff --git a/roles/mastodon/defaults/main.yml b/roles/mastodon/defaults/main.yml
index 573d677..ed18f57 100644
--- a/roles/mastodon/defaults/main.yml
+++ b/roles/mastodon/defaults/main.yml
@@ -54,7 +54,7 @@ mastodon_elasticsearch_adjust_sysctl: true
 # renovate: depName=ghcr.io/mastodon/mastodon
 mastodon_version: 4.2.1
 # renovate: depName=docker.io/library/postgres
-mastodon_database_version: 15.4
+mastodon_database_version: 15.5
 # renovate: depName=docker.io/library/redis
 mastodon_redis_version: 7.2
 # renovate: depName=docker.elastic.co/elasticsearch/elasticsearch