diff --git a/.assets/bootstrap.php b/.assets/bootstrap.php
index 927b26c..7cbbc34 100644
--- a/.assets/bootstrap.php
+++ b/.assets/bootstrap.php
@@ -44,6 +44,11 @@
 use Cake\Routing\Router;
 use Cake\Utility\Security;
 
+/**
+ * Load global functions.
+ */
+require CAKE . 'functions.php';
+
 /*
  * See https://github.com/josegonzalez/php-dotenv for API details.
  *
diff --git a/.docker/php/docker-entrypoint.sh b/.docker/php/docker-entrypoint.sh
index 66adbac..e8c774f 100644
--- a/.docker/php/docker-entrypoint.sh
+++ b/.docker/php/docker-entrypoint.sh
@@ -16,7 +16,7 @@ if [ "$1" = 'php-fpm' ] || [ "$1" = 'php' ] || [ "$1" = 'bin/cakephp' ]; then
         fi
 
         COMPOSER_MEMORY_LIMIT=-1
-        composer create-project --prefer-dist --no-interaction cakephp/app:^4.4 .
+        composer create-project --prefer-dist --no-interaction cakephp/app:^5.0 .
         rm -rf .github
         cp config/.env.example config/.env
         cp config/app_local.example.php config/app_local.php
diff --git a/.github/workflows/build.yml b/.github/workflows/build.yml
index 74c88ca..aa1f275 100644
--- a/.github/workflows/build.yml
+++ b/.github/workflows/build.yml
@@ -5,7 +5,7 @@ on: [pull_request]
 jobs:
   build:
     name: Docker Build
-    runs-on: ubuntu-latest
+    runs-on: ubuntu-22.04
     steps:
       - name: Checkout
         uses: actions/checkout@v2
@@ -14,11 +14,11 @@ jobs:
           cp .docker/php.env.development .docker/php.env
           cp .docker/mysql.env.development .docker/mysql.env
       - name: Pull images
-        run: docker-compose pull
+        run: docker compose pull
       - name: Build
-        run: docker-compose build --build-arg UID=$(id -u) --build-arg ENV=dev
+        run: docker compose build --build-arg UID=$(id -u) --build-arg ENV=dev
       - name: Start
-        run: docker-compose up -d
+        run: docker compose up -d
       - name: Wait for services
         run: sleep 10
       - name: Check CakePHP Welcome Page
diff --git a/Dockerfile b/Dockerfile
index 5e1120f..d63b5f3 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -15,7 +15,7 @@ ENV HOST_OS=$HOST_OS
 #
 RUN if [[ "$ENV" != "prod" ]]; then \
     apk add git \
-    && apk add --no-cache --virtual .php-deps file re2c autoconf make zlib zlib-dev g++ curl \
+    && apk add --update --no-cache --virtual .php-deps file re2c autoconf make zlib zlib-dev g++ curl linux-headers \
     && pecl install xdebug \
     && docker-php-ext-enable xdebug \
     && apk del -f .php-deps; \
diff --git a/README.md b/README.md
index 6c5cac6..38cc4a9 100644
--- a/README.md
+++ b/README.md
@@ -1,7 +1,7 @@
 # 🍰 CakePHP Docker
 
 [![Build](https://github.com/cnizzardini/cakephp-docker/workflows/Build/badge.svg?branch=master)](https://github.com/cnizzardini/cakephp-docker/actions)
-[![CakePHP](https://img.shields.io/badge/cakephp-4-red?logo=cakephp)](https://book.cakephp.org/4/en/index.html)
+[![CakePHP](https://img.shields.io/badge/cakephp-5-red?logo=cakephp)](https://book.cakephp.org/5/en/index.html)
 [![Docker](https://img.shields.io/badge/docker-ffffff.svg?logo=docker)](.docker)
 [![Kubernetes](https://img.shields.io/badge/kubernetes-D3D3D3.svg?logo=kubernetes)](.kube)
 [![PHP](https://img.shields.io/badge/php-8.1-8892BF.svg?logo=php)](https://hub.docker.com/_/php)