diff --git a/.docker/debian-manual-guide/Dockerfile b/.docker/debian-manual-guide/Dockerfile
index 73d0cee9..e3fb174b 100644
--- a/.docker/debian-manual-guide/Dockerfile
+++ b/.docker/debian-manual-guide/Dockerfile
@@ -1,8 +1,8 @@
 # Reproduces https://docs.part-db.de/installation/installation_guide-debian.html
-# on Debian 12 (bookworm) as closely as possible, for debugging issues reported
+# on Debian 13 (trixie) as closely as possible, for debugging issues reported
 # by users who followed that guide (Apache2 + mod_php, not the project's own
 # FrankenPHP-based Dockerfile at the repo root).
-FROM debian:12
+FROM debian:13
 
 ARG HOST_UID=1000
 ARG HOST_GID=1000
@@ -17,12 +17,12 @@ RUN apt-get update && apt-get upgrade -y && \
     && rm -rf /var/lib/apt/lists/*
 
 # --- PHP and Apache2 (guide: "PHP and Apache2 Setup") ---
-# Debian 12 ships PHP 8.2 by default, so no extra PHP repo is needed.
+# Debian 13 ships PHP 8.4 by default, so no extra PHP repo is needed.
 RUN apt-get update && apt-get install -y --no-install-recommends \
-        apache2 php8.2 libapache2-mod-php8.2 \
-        php8.2-opcache php8.2-curl php8.2-gd php8.2-mbstring \
-        php8.2-xml php8.2-bcmath php8.2-intl php8.2-zip php8.2-xsl \
-        php8.2-sqlite3 php8.2-mysql \
+        apache2 php8.4 libapache2-mod-php8.4 \
+        php8.4-opcache php8.4-curl php8.4-gd php8.4-mbstring \
+        php8.4-xml php8.4-bcmath php8.4-intl php8.4-zip php8.4-xsl \
+        php8.4-sqlite3 php8.4-mysql \
     && rm -rf /var/lib/apt/lists/*
 
 # --- Composer (guide: "Composer Installation") ---
diff --git a/docs/installation/installation_guide-debian.md b/docs/installation/installation_guide-debian.md
index 9729d772..77ea8020 100644
--- a/docs/installation/installation_guide-debian.md
+++ b/docs/installation/installation_guide-debian.md
@@ -1,13 +1,13 @@
 ---
-title: Direct Installation on Debian 12
+title: Direct Installation on Debian 13
 layout: default
 parent: Installation
 nav_order: 4
 ---
 
-# Part-DB installation guide for Debian 12 (Bookworm)
+# Part-DB installation guide for Debian 13 (Trixie)
 
-This guide shows you how to install Part-DB directly on Debian 12 using apache2 and SQLite. This guide should work with
+This guide shows you how to install Part-DB directly on Debian 13 using apache2 and SQLite. This guide should work with
 recent Ubuntu and other Debian-based distributions with little to no changes.
 Depending on what you want to do, using the prebuilt docker images may be a better choice, as you don't need to install
 this many dependencies. See [here]({% link installation/installation_docker.md %}) for more information on the docker
@@ -45,10 +45,10 @@ compatibility.
 Install PHP with required extensions and apache2:
 
 ```bash
-sudo apt install apache2 php8.2 libapache2-mod-php8.2 \
-  php8.2-opcache php8.2-curl php8.2-gd php8.2-mbstring \
-  php8.2-xml php8.2-bcmath php8.2-intl php8.2-zip php8.2-xsl \
-  php8.2-sqlite3 php8.2-mysql
+sudo apt install apache2 php8.4 libapache2-mod-php8.4 \
+  php8.4-opcache php8.4-curl php8.4-gd php8.4-mbstring \
+  php8.4-xml php8.4-bcmath php8.4-intl php8.4-zip php8.4-xsl \
+  php8.4-sqlite3 php8.4-mysql
 ```
 
 ### Install composer
@@ -301,7 +301,7 @@ sudo -u www-data php bin/console cache:clear
 ## MySQL/MariaDB database
 
 To use a MySQL database, follow the steps from above (except the creation of the database, we will do this later).
-Debian 12 does not ship MySQL in its repositories anymore, so we use the compatible MariaDB instead:
+Debian does not ship MySQL in its repositories anymore, so we use the compatible MariaDB instead:
 
 1. Install maria-db with: