diff --git a/Dockerfile b/Dockerfile
index d7fe370..4b33f15 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,6 +1,6 @@
 # Copyright (c) 2024 RFull Development
 # This source code is managed under the MIT license. See LICENSE in the project root.
-FROM php:lastest
+FROM php:latest
 
 # Install dependencies
 RUN apt update && \
diff --git a/README.md b/README.md
index cdf8899..72c9015 100644
--- a/README.md
+++ b/README.md
@@ -9,7 +9,7 @@ This repository is a Dev Container for PHP.
 | Base image and tags | php:*tag* |
 | Target platform | linux/x64, linux/arm64 |
 | Container registry's URL | https://hub.docker.com/r/ryotafunaki/devcontainer-php/ |
-| Installed packages | .NET SDK 8.0, Kiota |
+| Installed packages | .NET SDK 8.0, Kiota, Composer |
 
 ## How to use
 
diff --git a/root_shells/shells.d/install_composer.sh b/root_shells/shells.d/install_composer.sh
new file mode 100644
index 0000000..fcde0a7
--- /dev/null
+++ b/root_shells/shells.d/install_composer.sh
@@ -0,0 +1,9 @@
+#!/bin/bash
+# Copyright (c) 2024 RFull Development
+# This source code is managed under the MIT license. See LICENSE in the project root.
+php -r "copy('https://getcomposer.org/installer', 'composer-setup.php');"
+php -r "if (hash_file('sha384', 'composer-setup.php') === 'dac665fdc30fdd8ec78b38b9800061b4150413ff2e3b6f88543c636f7cd84f6db9189d43a81e5503cda447da73c7e5b6') { echo 'Installer verified'; } else { echo 'Installer corrupt'; unlink('composer-setup.php'); } echo PHP_EOL;"
+php composer-setup.php
+php -r "unlink('composer-setup.php');"
+mv composer.phar /usr/local/bin/composer
+exit 0