diff --git a/etcd/README.md b/etcd/README.md
index 69f702b..7bcbfac 100644
--- a/etcd/README.md
+++ b/etcd/README.md
@@ -4,4 +4,17 @@ etcd
 [etcd][1] is a distributed, reliable key-value store for the most critical data
 of a distributed system.
 
+```bash
+$ docker-compose up -d
+$ docker-compose exec etcd bash
+>>> etcdctl version
+etcdctl version: 3.5.1
+API version: 3.5
+>>> etcdctl put foo bar
+OK
+>>> etcdctl gut foo
+foo
+bar
+```
+
 [1]: https://etcd.io/
diff --git a/etcd/docker-compose.yml b/etcd/docker-compose.yml
index a7126b3..d8c0757 100644
--- a/etcd/docker-compose.yml
+++ b/etcd/docker-compose.yml
@@ -1,9 +1,9 @@
-# https://etcd.io/docs/v3.4.0/op-guide/container/
+# https://etcd.io/docs/v3.5/op-guide/container/
 
 version: "3.8"
 services:
   etcd:
-    image: quay.io/coreos/etcd:v3.4.8
+    image: quay.io/coreos/etcd:v3.5.1
     command: >
       etcd --name=node1
            --data-dir=/data
@@ -12,9 +12,16 @@ services:
            --advertise-client-urls=http://1.2.3.4:2379
            --listen-client-urls=http://0.0.0.0:2379
            --initial-cluster=node1=http://1.2.3.4:2380
+           --initial-cluster-token=my-etcd-token
     ports:
       - "2379:2379"
       - "2380:2380"
     volumes:
       - ./data:/data
+    environment:
+      - ETCDCTL_API=3
+      - ETCD_LOGGER=zap
+      - ETCD_LOG_LEVEL=info
+      - ETCD_LOG_OUTPUTS=/data/etcd.log
+      - ETCD_ENABLE_LOG_ROTATION=true
     restart: unless-stopped