diff --git a/docs/deployment.md b/docs/deployment.md
index e2831e09a..71ecc31d8 100644
--- a/docs/deployment.md
+++ b/docs/deployment.md
@@ -84,6 +84,8 @@ mariadb:
 # You must set this to enable the message search feature.
 es:
   url: http://es:9200
+  username: elastic
+  password: password
 
 # Storage settings for uploaded files.
 storage:
@@ -217,6 +219,8 @@ mariadb:
 
 es:
   url: http://es:9200
+  username: elastic
+  password: password
 
 storage:
   type: local
@@ -397,11 +401,12 @@ services:
       - db:/var/lib/mysql
 
   es:
-    image: ghcr.io/traptitech/es-with-sudachi:7.17.9-3.0.1
+    image: ghcr.io/traptitech/es-with-sudachi:8.8.1-3.1.0
     container_name: traq-es
     restart: always
     environment:
       - discovery.type=single-node
+      - ELASTIC_PASSWORD=password
     expose:
       - "9200"
     volumes: