diff --git a/.github/workflows/docker_publish.yml b/.github/workflows/docker_publish.yml
index 8cb7aae..c08c62d 100644
--- a/.github/workflows/docker_publish.yml
+++ b/.github/workflows/docker_publish.yml
@@ -15,14 +15,13 @@ jobs:
   # See also https://docs.docker.com/docker-hub/builds/
   push:
     # Ensure test job passes before pushing image.
-    # needs: test
 
     runs-on: ubuntu-latest
     if: github.event_name == 'push'
 
     steps:
       - name: Checkout repository
-        uses: actions/checkout@v3
+        uses: actions/checkout@v4
 
       - name: Build image
         run: docker build . --file Dockerfile --tag $IMAGE_NAME 
diff --git a/CHANGELOG.md b/CHANGELOG.md
index 3a0b96d..df1e9b2 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -6,6 +6,14 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 
 ## [Unreleased]
 
+## [3.3.0] - 2024-10-21
+### Added
+* Add apt package `telnet`.
+
+### Changed
+- Lift to base image `nginx:1.27.2`.
+- Lift PHP version from `8.2` to `8.3`.
+
 ## [3.2.0] - 2023-11-17
 ### Updated
 * Update `nodejs` version which also contains `npm`
diff --git a/Dockerfile b/Dockerfile
index 7d32ca7..add93cc 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -2,7 +2,7 @@
 # Improved with https://hadolint.github.io/hadolint/
 ####################################################
 
-FROM nginx:1.25.3
+FROM nginx:1.27.2
 
 ARG TOKEN 
 ARG ROOT_PATH=/var/www/html
@@ -16,7 +16,7 @@ ARG SUPERCRONIC_SHA1SUM=d7f4c0886eb85249ad05ed592902fa6865bb9d70
 
 # Variables for supercronic, TYPO3, PHP
 ENV TYPO3_CONTEXT=Production/Live \
-    PHP_INI_SCAN_DIR=/etc/php/8.2/fpm/conf.d
+    PHP_INI_SCAN_DIR=/etc/php/8.3/fpm/conf.d
 
 # see https://github.com/hadolint/hadolint/wiki/DL4006
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
@@ -43,6 +43,7 @@ RUN apt-get update && \
         openrc \
 	patch \
         supervisor \
+        telnet \
         tini \
         unzip \
         vim \
@@ -55,25 +56,25 @@ RUN apt-get update && \
     echo "deb https://packages.sury.org/php/ $(lsb_release -sc) main" | tee /etc/apt/sources.list.d/php.list && \
     apt-get update && \
     apt-get install --no-install-recommends --no-install-suggests -y \
-        php8.2 \
-        php8.2-apcu \
-        php8.2-cli \
-        php8.2-common \
-        php8.2-curl \
-        php8.2-dom \
-        php8.2-fpm \
-        php8.2-gd \
-        php8.2-intl \
-        php8.2-mbstring \
-        php8.2-mysql \
-        php8.2-opcache \
-        php8.2-pdo \
-        php8.2-pgsql \
-        php8.2-redis \
-        php8.2-sqlite3 \
-        php8.2-tokenizer \
-        php8.2-xml \
-        php8.2-zip && \
+        php8.3 \
+        php8.3-apcu \
+        php8.3-cli \
+        php8.3-common \
+        php8.3-curl \
+        php8.3-dom \
+        php8.3-fpm \
+        php8.3-gd \
+        php8.3-intl \
+        php8.3-mbstring \
+        php8.3-mysql \
+        php8.3-opcache \
+        php8.3-pdo \
+        php8.3-pgsql \
+        php8.3-redis \
+        php8.3-sqlite3 \
+        php8.3-tokenizer \
+        php8.3-xml \
+        php8.3-zip && \
     # Install composer:
     # Get it and hash; install if hash is verified; install globally; delete created install file
     curl -sS https://getcomposer.org/installer -o composer-setup.php && \
@@ -106,7 +107,7 @@ RUN apt-get update && \
     # remove cache
     apt-get autoremove && apt-get clean && rm -rf /var/lib/apt/lists/*
 
-    # Directory /run/php is needed for php8.2-fpm.sock
+    # Directory /run/php is needed for php8.3-fpm.sock
     RUN mkdir -p /run/php && \
     # Directory /nonexistent which is needed for "composer config -g ..."
     mkdir -p /nonexistent && \
diff --git a/README.md b/README.md
index a3c54f2..3f49980 100644
Binary files a/README.md and b/README.md differ
diff --git a/etc/php/8.2/fpm/conf.d/typo3.ini b/etc/php/8.3/fpm/conf.d/typo3.ini
similarity index 100%
rename from etc/php/8.2/fpm/conf.d/typo3.ini
rename to etc/php/8.3/fpm/conf.d/typo3.ini
diff --git a/etc/php/8.2/fpm/pool.d/www.conf b/etc/php/8.3/fpm/pool.d/www.conf
similarity index 100%
rename from etc/php/8.2/fpm/pool.d/www.conf
rename to etc/php/8.3/fpm/pool.d/www.conf
diff --git a/etc/supervisord.conf b/etc/supervisord.conf
index fda1987..3510084 100644
--- a/etc/supervisord.conf
+++ b/etc/supervisord.conf
@@ -28,7 +28,7 @@ startretries=3
 priority=1
 
 [program:php-fpm]
-command=php-fpm8.2 -F
+command=php-fpm8.3 -F
 stdout_logfile=/dev/stdout
 stdout_logfile_maxbytes=0
 stderr_logfile=/dev/stderr