diff --git a/homeserver.yaml.tmpl b/homeserver.yaml.tmpl
index 55df6bc..c236929 100644
--- a/homeserver.yaml.tmpl
+++ b/homeserver.yaml.tmpl
@@ -767,7 +767,7 @@ database:
     user: synapse
     password: {{ env "db_password" }}
     database: synapse
-    host: db
+    host: "{{ env "STACK_NAME"}}_db"
     port: 5432
     cp_min: 5
     cp_max: 10