diff --git a/Cargo.lock b/Cargo.lock
index 95039c67..e9f37600 100644
--- a/Cargo.lock
+++ b/Cargo.lock
@@ -2331,7 +2331,7 @@ checksum = "212d0f5754cb6769937f4501cc0e67f4f4483c8d2c3e1e922ee9edbe4ab4c7c0"
 name = "docker_sample"
 version = "0.1.0"
 dependencies = [
- "actix-web 3.3.3",
+ "actix-web 4.0.0-beta.21",
  "env_logger 0.9.0",
  "log",
 ]
diff --git a/basics/docker_sample/Cargo.toml b/basics/docker_sample/Cargo.toml
index d5be97cc..ad41f78d 100644
--- a/basics/docker_sample/Cargo.toml
+++ b/basics/docker_sample/Cargo.toml
@@ -5,6 +5,6 @@ authors = ["docker_sample <docker_sample@sample.com>"]
 edition = "2018"
 
 [dependencies]
-actix-web = "3"
+actix-web = "4.0.0-beta.21"
 env_logger = "0.9"
 log = "0.4"
diff --git a/basics/docker_sample/README.MD b/basics/docker_sample/README.MD
index a00a7941..187d4c2c 100644
--- a/basics/docker_sample/README.MD
+++ b/basics/docker_sample/README.MD
@@ -9,14 +9,14 @@ docker build -t docker_sample .
 ## Run built image
 
 ```shell
-docker run -d -p 5000:5000 docker_sample
+docker run -d -p 8080:8080 docker_sample
 # and the server should start instantly
-curl http://localhost:5000
+curl http://localhost:8080
 ```
 
 ## Running unit tests
 
 ```shell
-docker build -t docker_sample:test --target base .
+docker build -t docker_sample:test .
 docker run --rm docker_sample:test
 ```