diff --git a/Build/install.sh b/Build/install.sh
index ff16ae59..afb71fdd 100644
--- a/Build/install.sh
+++ b/Build/install.sh
@@ -6,7 +6,7 @@ set -o errexit
 PROJECT_HOME="$(cd "$(dirname "${BASH_SOURCE[0]}")/.." && pwd)"
 
 # The branch of TYPO3 to checkout (e.g. 'TYPO3_8-7', 'TYPO3_7-6')
-: ${TYPO3="master"}
+: ${TYPO3="v11"}
 : ${REPO="$(basename ${PROJECT_HOME})"}
 
 : ${PHP_BINARY="php"}
diff --git a/Dockerfile b/Dockerfile
index b8a9836f..1a4a95be 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -4,18 +4,18 @@
 # Build:
 # > docker build -t cundd/rest .
 #
-# Build for TYPO3 7.6:
-# > docker build -t cundd/rest --build-arg TYPO3=TYPO3_7-6 .
+# Build for TYPO3 v10:
+# > docker build -t cundd/rest --build-arg TYPO3=v10 .
 #
 # Run tests:
-# > docker-compose run test
+# > docker compose run test
 #
-FROM php:7.3-cli
+FROM php:8.1-cli
 
 # -----------------------------------------------------------------
 # PREPARE THE OS
 
-RUN apt-get update && apt-get install -y git zip mysql-client
+RUN apt-get update && apt-get install -y git zip default-mysql-client
 RUN docker-php-ext-install opcache mysqli
 #RUN docker-php-ext-install iconv mcrypt zip opcache mysqli pdo_mysql gd
 
@@ -29,8 +29,8 @@ RUN bash /app/Resources/Private/Scripts/composer-install.sh
 # -----------------------------------------------------------------
 # INSTALL TYPO3
 
-# Install TYPO3 master branch
-ARG TYPO3=master
+# Install TYPO3 v11
+ARG TYPO3=v11
 # MariaDB is linked as host "db" (see docker-composer.yml)
 ARG typo3DatabaseHost=db
 
@@ -40,7 +40,6 @@ ENV typo3DatabaseHost=${typo3DatabaseHost}
 
 COPY ./Build /app/Build
 RUN bash /app/Build/install.sh install_typo3 && bash /app/Build/install.sh prepare_database
-RUN ln -s /app/ /app/../TYPO3.CMS/typo3conf/ext/rest
 
 
 VOLUME /app