diff --git a/roles/mastodon/defaults/main.yml b/roles/mastodon/defaults/main.yml
index d03104a..8d60ff6 100644
--- a/roles/mastodon/defaults/main.yml
+++ b/roles/mastodon/defaults/main.yml
@@ -51,7 +51,7 @@ mastodon_config:
 # renovate: depName=docker.io/tootsuite/mastodon
 mastodon_version: 4.0.2
 # renovate: depName=docker.io/library/postgres
-mastodon_database_version: 9.6
+mastodon_database_version: 15.1
 # renovate: depName=docker.io/library/redis
 mastodon_redis_version: 7.0
 # renovate: depName=docker.elastic.co/elasticsearch/elasticsearch-oss
diff --git a/roles/mastodon/templates/docker-compose.yml b/roles/mastodon/templates/docker-compose.yml
index d339eac..a711d2b 100644
--- a/roles/mastodon/templates/docker-compose.yml
+++ b/roles/mastodon/templates/docker-compose.yml
@@ -57,6 +57,8 @@ services:
     tmpfs:
       - /run/postgresql:size=512K
       - /tmp:size=128K
+    environment:
+      - "POSTGRES_HOST_AUTH_METHOD=trust"
     stop_grace_period: 2m
     stop_signal: SIGINT
     networks: