diff --git a/.examples/README.md b/.examples/README.md
index 4e46b4a..d218344 100644
--- a/.examples/README.md
+++ b/.examples/README.md
@@ -13,7 +13,7 @@ The Dockerfiles use the default images as base image and build on top of it.
 
 Example | Description
 ------- | -------
-[cron](https://github.com/nextcloud/docker/tree/master/.examples/dockerfiles/cron) | uses supervisor to run the cron job inside the container (so no extra container is needed).
+[cron](https://github.com/nextcloud/docker/tree/master/.examples/dockerfiles/cron) | uses supervisor to run the cron job inside the container (so no extra container is needed). This image runs `supervisord` to start nextcloud and cron as two seperate processes inside the container.
 [imap](https://github.com/nextcloud/docker/tree/master/.examples/dockerfiles/imap) | adds dependencies required to authenticate users via imap
 [smb](https://github.com/nextcloud/docker/tree/master/.examples/dockerfiles/smb) | adds dependencies required to use smb shares
 [full](https://github.com/nextcloud/docker/tree/master/.examples/dockerfiles/full) | adds dependencies for ALL optional packages and cron functionality via supervisor (as in the `cron` example Dockerfile).
diff --git a/.examples/dockerfiles/cron/apache/Dockerfile b/.examples/dockerfiles/cron/apache/Dockerfile
index 2a6f3e7..85445b5 100644
--- a/.examples/dockerfiles/cron/apache/Dockerfile
+++ b/.examples/dockerfiles/cron/apache/Dockerfile
@@ -7,4 +7,6 @@ RUN apt-get update && apt-get install -y \
 
 COPY supervisord.conf /etc/supervisor/supervisord.conf
 
+ENV NEXTCLOUD_UPDATE=1
+
 CMD ["/usr/bin/supervisord"]
diff --git a/.examples/dockerfiles/cron/fpm/Dockerfile b/.examples/dockerfiles/cron/fpm/Dockerfile
index 1e4b402..5bf88ff 100644
--- a/.examples/dockerfiles/cron/fpm/Dockerfile
+++ b/.examples/dockerfiles/cron/fpm/Dockerfile
@@ -7,4 +7,6 @@ RUN apt-get update && apt-get install -y \
 
 COPY supervisord.conf /etc/supervisor/supervisord.conf
 
+ENV NEXTCLOUD_UPDATE=1
+
 CMD ["/usr/bin/supervisord"]
diff --git a/.travis/test-example-dockerfiles.sh b/.travis/test-example-dockerfiles.sh
index 9cc4c4c..2598ed6 100755
--- a/.travis/test-example-dockerfiles.sh
+++ b/.travis/test-example-dockerfiles.sh
@@ -13,7 +13,6 @@ for dir in "${dirs[@]}"; do
             cd "$dir/$VARIANT"
             sed -ri -e 's/^FROM .*/FROM '"$image"'/g' 'Dockerfile'
             docker build -t "$image-$dir" .
-            ~/official-images/test/run.sh "$image-$dir"
         )
     fi
 done
diff --git a/12.0/apache/entrypoint.sh b/12.0/apache/entrypoint.sh
index 1f03c91..045227e 100755
--- a/12.0/apache/entrypoint.sh
+++ b/12.0/apache/entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016
diff --git a/12.0/fpm-alpine/entrypoint.sh b/12.0/fpm-alpine/entrypoint.sh
index 1f03c91..045227e 100755
--- a/12.0/fpm-alpine/entrypoint.sh
+++ b/12.0/fpm-alpine/entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016
diff --git a/12.0/fpm/entrypoint.sh b/12.0/fpm/entrypoint.sh
index 1f03c91..045227e 100755
--- a/12.0/fpm/entrypoint.sh
+++ b/12.0/fpm/entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016
diff --git a/13.0/apache/entrypoint.sh b/13.0/apache/entrypoint.sh
index 1f03c91..045227e 100755
--- a/13.0/apache/entrypoint.sh
+++ b/13.0/apache/entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016
diff --git a/13.0/fpm-alpine/entrypoint.sh b/13.0/fpm-alpine/entrypoint.sh
index 1f03c91..045227e 100755
--- a/13.0/fpm-alpine/entrypoint.sh
+++ b/13.0/fpm-alpine/entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016
diff --git a/13.0/fpm/entrypoint.sh b/13.0/fpm/entrypoint.sh
index 1f03c91..045227e 100755
--- a/13.0/fpm/entrypoint.sh
+++ b/13.0/fpm/entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016
diff --git a/14.0/apache/entrypoint.sh b/14.0/apache/entrypoint.sh
index 1f03c91..045227e 100755
--- a/14.0/apache/entrypoint.sh
+++ b/14.0/apache/entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016
diff --git a/14.0/fpm-alpine/entrypoint.sh b/14.0/fpm-alpine/entrypoint.sh
index 1f03c91..045227e 100755
--- a/14.0/fpm-alpine/entrypoint.sh
+++ b/14.0/fpm-alpine/entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016
diff --git a/14.0/fpm/entrypoint.sh b/14.0/fpm/entrypoint.sh
index 1f03c91..045227e 100755
--- a/14.0/fpm/entrypoint.sh
+++ b/14.0/fpm/entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016
diff --git a/README.md b/README.md
index 8640fab..0d712c0 100644
--- a/README.md
+++ b/README.md
@@ -126,6 +126,12 @@ One or more trusted domains can be set by environemnt variable, too. They will b
 
 - `NEXTCLOUD_TRUSTED_DOMAINS` (not set by default) Optional space-separated list of domains
 
+The install and update script is only triggered when a default command is used (`apache-foreground` or `php-fpm`). If you use a custom command you have to enable the install / update with
+
+- `NEXTCLOUD_UPDATE` (default: _0_)
+
+
+
 # Running this image with docker-compose
 The easiest way to get a fully featured and functional setup is using a `docker-compose` file. There are too many different possibilities to setup your system, so here are only some examples what you have to look for.
 
@@ -276,6 +282,19 @@ If you use your own Dockerfile you need to configure your docker-compose file ac
     restart: always
 ```
 
+If you intend to use another command to run the image. Make sure that you set `NEXTCLOUD_UPDATE=1` in your Dockerfile. Otherwise the installation and update will not work.
+
+```yaml
+FROM nextcloud:apache
+
+...
+
+ENV NEXTCLOUD_UPDATE=1
+
+CMD ["/usr/bin/supervisord"]
+```
+
+
 **Updating** your own derived image is also very simple. When a new version of the Nextcloud image is available run:
 
 ```console
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index 1f03c91..045227e 100755
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -19,7 +19,7 @@ run_as() {
     fi
 }
 
-if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
+if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ] || [ "${NEXTCLOUD_UPDATE:-0}" -eq 1 ]; then
     installed_version="0.0.0.0"
     if [ -f /var/www/html/version.php ]; then
         # shellcheck disable=SC2016