diff --git a/.env.example b/.env.example
new file mode 100644
index 0000000..1d11df2
--- /dev/null
+++ b/.env.example
@@ -0,0 +1 @@
+#DATABASE_URL=
diff --git a/README.md b/README.md
index 984a0bf..eb1d06a 100644
--- a/README.md
+++ b/README.md
@@ -5,6 +5,7 @@
 - Docker Compose
 - systemd
 - systemd-journald
+- PostgreSQL
 
 Git リポジトリを取得し、設定ファイルを配置
 
@@ -14,7 +15,8 @@ git clone git@github.com:kou029w/keiu.net.git
 cd keiu.net
 sudo install -m 644 {,/}etc/docker/daemon.json
 sudo systemctl restart docker
-install -m 600 <(echo POSTGRES_PASSWORD=$(python3 -c 'import secrets; print(secrets.token_urlsafe())')) .env
+cp .env{.example,}
+editor .env # PostgreSQL接続URLを設定
 ```
 
 ## 構築
diff --git a/compose.yml b/compose.yml
index 5160ed9..c0c4d5a 100644
--- a/compose.yml
+++ b/compose.yml
@@ -17,24 +17,10 @@ services:
     restart: unless-stopped
     environment:
       LISTEN_ADDR: /tmp/miniflux.sock
-      DATABASE_URL: postgresql://postgres:${POSTGRES_PASSWORD}@/postgres?host=/tmp/postgresql
+      DATABASE_URL: ${DATABASE_URL}
       RUN_MIGRATIONS: "1"
     volumes:
       - minicharge_tmp:/tmp
-      - postgres_tmp:/tmp/postgresql
-    depends_on:
-      db:
-        condition: service_healthy
-  db:
-    image: postgres:14.3-alpine@sha256:5973fec8d8284c8961ac3c23945e52d533dd0d21cc7b3c7dd7a46fd199bed4a4
-    restart: unless-stopped
-    healthcheck:
-      test: pg_isready -U postgres
-    environment:
-      POSTGRES_PASSWORD: ${POSTGRES_PASSWORD}
-    volumes:
-      - postgres_tmp:/var/run/postgresql
-      - postgres_data_v14:/var/lib/postgresql/data
   dns.keiu.net:
     image: coredns/coredns:1.9.3@sha256:8e352a029d304ca7431c6507b56800636c321cb52289686a581ab70aaa8a2e2a
     restart: unless-stopped
@@ -52,5 +38,3 @@ volumes:
   caddy_data:
   caddy_config:
   minicharge_tmp:
-  postgres_tmp:
-  postgres_data_v14: