diff --git a/Dockerfile b/Dockerfile
index a21d918c6..87cedb5f1 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,7 +1,7 @@
-ARG ALPINE_VERSION=3.20
+ARG ALPINE_VERSION=3.21
 FROM alpine:${ALPINE_VERSION}
 LABEL Maintainer="Tim de Pater <code@trafex.nl>"
-LABEL Description="Lightweight container with Nginx 1.26 & PHP 8.3 based on Alpine Linux."
+LABEL Description="Lightweight container with Nginx 1.26 & PHP 8.4 based on Alpine Linux."
 # Setup document root
 WORKDIR /var/www/html
 
@@ -9,24 +9,24 @@ WORKDIR /var/www/html
 RUN apk add --no-cache \
   curl \
   nginx \
-  php83 \
-  php83-ctype \
-  php83-curl \
-  php83-dom \
-  php83-fileinfo \
-  php83-fpm \
-  php83-gd \
-  php83-intl \
-  php83-mbstring \
-  php83-mysqli \
-  php83-opcache \
-  php83-openssl \
-  php83-phar \
-  php83-session \
-  php83-tokenizer \
-  php83-xml \
-  php83-xmlreader \
-  php83-xmlwriter \
+  php84 \
+  php84-ctype \
+  php84-curl \
+  php84-dom \
+  php84-fileinfo \
+  php84-fpm \
+  php84-gd \
+  php84-intl \
+  php84-mbstring \
+  php84-mysqli \
+  php84-opcache \
+  php84-openssl \
+  php84-phar \
+  php84-session \
+  php84-tokenizer \
+  php84-xml \
+  php84-xmlreader \
+  php84-xmlwriter \
   supervisor
 
 # Configure nginx - http
@@ -35,7 +35,7 @@ COPY config/nginx.conf /etc/nginx/nginx.conf
 COPY config/conf.d /etc/nginx/conf.d/
 
 # Configure PHP-FPM
-ENV PHP_INI_DIR /etc/php83
+ENV PHP_INI_DIR /etc/php84
 COPY config/fpm-pool.conf ${PHP_INI_DIR}/php-fpm.d/www.conf
 COPY config/php.ini ${PHP_INI_DIR}/conf.d/custom.ini
 
diff --git a/README.md b/README.md
index 30888d888..5873002dd 100644
--- a/README.md
+++ b/README.md
@@ -1,5 +1,5 @@
-# Docker PHP-FPM 8.3 & Nginx 1.26 on Alpine Linux
-Example PHP-FPM 8.3 & Nginx 1.26 container image for Docker, built on [Alpine Linux](https://www.alpinelinux.org/).
+# Docker PHP-FPM 8.4 & Nginx 1.26 on Alpine Linux
+Example PHP-FPM 8.4 & Nginx 1.26 container image for Docker, built on [Alpine Linux](https://www.alpinelinux.org/).
 
 Repository: https://github.com/TrafeX/docker-php-nginx
 
@@ -7,7 +7,7 @@ Repository: https://github.com/TrafeX/docker-php-nginx
 * Built on the lightweight and secure Alpine Linux distribution
 * Multi-platform, supporting AMD4, ARMv6, ARMv7, ARM64
 * Very small Docker image size (+/-40MB)
-* Uses PHP 8.3 for the best performance, low CPU usage & memory footprint
+* Uses PHP 8.4 for the best performance, low CPU usage & memory footprint
 * Optimized for 100 concurrent users
 * Optimized to only use resources when there's traffic (by using PHP-FPM's `on-demand` process manager)
 * The services Nginx, PHP-FPM and supervisord run under a non-privileged user (nobody) to make it more secure
@@ -16,7 +16,7 @@ Repository: https://github.com/TrafeX/docker-php-nginx
 
 [![Docker Pulls](https://img.shields.io/docker/pulls/trafex/php-nginx.svg)](https://hub.docker.com/r/trafex/php-nginx/)
 ![nginx 1.26](https://img.shields.io/badge/nginx-1.26-brightgreen.svg)
-![php 8.3](https://img.shields.io/badge/php-8.3-brightgreen.svg)
+![php 8.4](https://img.shields.io/badge/php-8.4-brightgreen.svg)
 ![License MIT](https://img.shields.io/badge/license-MIT-blue.svg)
 
 ## [![Trafex Consultancy](https://timdepater.com/logo/mini-logo.png)](https://timdepater.com?mtm_campaign=github)
@@ -53,11 +53,11 @@ Nginx configuration:
 
 PHP configuration:
 
-    docker run -v "`pwd`/php-setting.ini:/etc/php83/conf.d/settings.ini" trafex/php-nginx
+    docker run -v "`pwd`/php-setting.ini:/etc/php84/conf.d/settings.ini" trafex/php-nginx
 
 PHP-FPM configuration:
 
-    docker run -v "`pwd`/php-fpm-settings.conf:/etc/php83/php-fpm.d/server.conf" trafex/php-nginx
+    docker run -v "`pwd`/php-fpm-settings.conf:/etc/php84/php-fpm.d/server.conf" trafex/php-nginx
 
 _Note; Because `-v` requires an absolute path I've added `pwd` in the example to return the absolute path to the current directory_
 
diff --git a/config/supervisord.conf b/config/supervisord.conf
index 26dabbe66..0922e2fd5 100644
--- a/config/supervisord.conf
+++ b/config/supervisord.conf
@@ -5,7 +5,7 @@ logfile_maxbytes=0
 pidfile=/run/supervisord.pid
 
 [program:php-fpm]
-command=php-fpm83 -F
+command=php-fpm84 -F
 stdout_logfile=/dev/stdout
 stdout_logfile_maxbytes=0
 stderr_logfile=/dev/stderr
diff --git a/docs/xdebug-support.md b/docs/xdebug-support.md
index 46c78a2fb..34d8210a4 100644
--- a/docs/xdebug-support.md
+++ b/docs/xdebug-support.md
@@ -27,7 +27,7 @@ FROM trafex/php-nginx:latest
 USER root
 
 # Install xdebug
-RUN apk add --no-cache php83-pecl-xdebug
+RUN apk add --no-cache php84-pecl-xdebug
 
 # Add configuration
 COPY xdebug.ini ${PHP_INI_DIR}/conf.d/xdebug.ini
diff --git a/run_tests.sh b/run_tests.sh
index 69d0b8f3e..818614738 100755
--- a/run_tests.sh
+++ b/run_tests.sh
@@ -1,3 +1,3 @@
 #!/usr/bin/env sh
 apk --no-cache add curl
-curl --silent --fail http://app:8080 | grep 'PHP 8.3'
+curl --silent --fail http://app:8080 | grep 'PHP 8.4'