diff --git a/postgres/README.md b/postgres/README.md
index 08729ee..3d44d23 100644
--- a/postgres/README.md
+++ b/postgres/README.md
@@ -10,11 +10,13 @@ postgres:
   image: postgres:alpine
   ports:
     - "5432:5432"
+  volumes:
+    - ./data:/var/lib/postgresql/data
   environment:
-    - POSTGRES_USER=root
-    - POSTGRES_PASSWORD=root
+    - POSTGRES_USER=postgres
+    - POSTGRES_PASSWORD=postgres
     - POSTGRES_DB=postgres
-  restart: always
+  restart: unless-stopped
 ```
 
 ## up and running
@@ -22,7 +24,7 @@ postgres:
 ```bash
 $ docker-compose up -d
 
-$ docker-compose exec postgres psql -U root postgres
+$ docker-compose exec postgres psql -U postgres postgres
 >>> SELECT CURRENT_TIMESTAMP;
               now
 -------------------------------
diff --git a/postgres/docker-compose.yml b/postgres/docker-compose.yml
index ab56159..cf76292 100644
--- a/postgres/docker-compose.yml
+++ b/postgres/docker-compose.yml
@@ -5,7 +5,7 @@ postgres:
   volumes:
     - ./data:/var/lib/postgresql/data
   environment:
-    - POSTGRES_USER=root
-    - POSTGRES_PASSWORD=root
+    - POSTGRES_USER=postgres
+    - POSTGRES_PASSWORD=postgres
     - POSTGRES_DB=postgres
-  restart: always
+  restart: unless-stopped
diff --git a/scrapyd/arm/docker-compose.yml b/scrapyd/arm/docker-compose.yml
index 7c85c10..e27dedb 100644
--- a/scrapyd/arm/docker-compose.yml
+++ b/scrapyd/arm/docker-compose.yml
@@ -4,5 +4,5 @@ scrapyd:
     - "6800:6800"
   volumes:
     - ./data:/var/lib/scrapyd
-    - /usr/local/lib/python2.7/dist-packages
-  restart: always
+    - /usr/local/lib/python3.7/dist-packages
+  restart: unless-stopped