diff --git a/README.md b/README.md
index e87f831..8640fab 100644
--- a/README.md
+++ b/README.md
@@ -122,6 +122,9 @@ If you want you can set the data directory and table prefix, otherwise default v
 - `NEXTCLOUD_DATA_DIR` (default: _/var/www/html/data_) Configures the data directory where nextcloud stores all files from the users.
 - `NEXTCLOUD_TABLE_PREFIX` (default: _""_) Optional prefix for the tables. Used to be `oc_` in the past
 
+One or more trusted domains can be set by environemnt variable, too. They will be added to the configuration after install.
+
+- `NEXTCLOUD_TRUSTED_DOMAINS` (not set by default) Optional space-separated list of domains
 
 # 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.
diff --git a/docker-entrypoint.sh b/docker-entrypoint.sh
index c1c106c..1f03c91 100755
--- a/docker-entrypoint.sh
+++ b/docker-entrypoint.sh
@@ -88,7 +88,7 @@ if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
                     install_options=$install_options' --database pgsql --database-name "$POSTGRES_DB" --database-user "$POSTGRES_USER" --database-pass "$POSTGRES_PASSWORD" --database-host "$POSTGRES_HOST"'
                     install=true
                 fi
-                
+
                 if [ "$install" = true ]; then
                     echo "starting nexcloud installation"
                     max_retries=10
@@ -103,6 +103,15 @@ if expr "$1" : "apache" 1>/dev/null || [ "$1" = "php-fpm" ]; then
                         echo "installing of nextcloud failed!"
                         exit 1
                     fi
+                    if [ -n "${NEXTCLOUD_TRUSTED_DOMAINS+x}" ]; then
+                        echo "setting trusted domains…"
+                        NC_TRUSTED_DOMAIN_IDX=1
+                        for DOMAIN in $NEXTCLOUD_TRUSTED_DOMAINS ; do
+                            DOMAIN=$(echo "$DOMAIN" | sed -e 's/^[[:space:]]*//' -e 's/[[:space:]]*$//')
+                            run_as "php /var/www/html/occ config:system:set trusted_domains $NC_TRUSTED_DOMAIN_IDX --value=$DOMAIN"
+                            NC_TRUSTED_DOMAIN_IDX=$(($NC_TRUSTED_DOMAIN_IDX+1))
+                        done
+                    fi
                 else
                     echo "running web-based installer on first connect!"
                 fi