diff --git a/RESOURCES/OPTIONS/app_dns/app_dns.sh b/RESOURCES/OPTIONS/app_dns/app_dns.sh
new file mode 100755
index 0000000..54c873b
--- /dev/null
+++ b/RESOURCES/OPTIONS/app_dns/app_dns.sh
@@ -0,0 +1,49 @@
+#!/bin/bash
+
+# global definitions:
+RED='\033[0;31m'
+NC='\033[0m'
+
+# check the parameters
+if [ $# != 2 ]; then
+  echo "usage : $0 <project_root> <dns_replacement>"
+  exit 1
+fi
+
+project_root="$1"
+dns_replacement="$2"
+
+# check the project root folder
+if [ ! -d "$project_root" ]; then
+  echo -e "${RED}ERROR: Cannot find the folder '$project_root' ${NC}"
+  exit 2
+fi
+
+# check the target file
+def_target="$project_root/unpacked/squashfs-root/app/app"
+if [ ! -f "$def_target" ]; then
+  echo -e "${RED}ERROR: Cannot find the target file '$def_target' ${NC}"
+  exit 3
+fi
+
+# patch the app
+old_dns=$(echo -n "$dns_replacement" | cut -d "|" -f 1)
+new_dns=$(echo -n "$dns_replacement" | cut -d "|" -f 2)
+if [ -z "$old_dns" ] || [ -z "$new_dns" ]; then
+  echo -e "${RED}ERROR: The requested DNS replacement is not valid: '$dns_replacement' ${NC}"
+  exit 4
+fi
+dns_url="udp://$old_dns:53"
+# find all records with offsets that match the requested old DNS
+results=$(grep --binary-files=text -b -o "$dns_url" "$def_target" | xargs echo -n)
+if [ -z "$results" ]; then
+  echo -e "${RED}ERROR: The 'app' might be already patched. Cannot find the expected DNS '$dns_url' ${NC}"
+  exit 5
+fi
+# replace all found old DNS with the new one
+for result in $results; do
+  offset=$(echo -n "$result" | awk -F: '{print $1}')
+  printf "udp://%s:53\x00" "$new_dns" | dd of="$def_target" bs=1 seek="$offset" conv=notrunc &>>/dev/null
+done
+
+exit 0
diff --git a/options.cfg b/options.cfg
index af2eb5f..33acbd5 100644
--- a/options.cfg
+++ b/options.cfg
@@ -66,6 +66,14 @@ kobra_unleashed="localhost.mr-a.de"
 # Available settings are: 5s, 10s, 20s, 30s and 60s
 app_net_ready="30s"
 
+# Modify the hardcoded app DNS
+# For parameter(s) provide "old_dns|new_dns"
+# Available hardcoded DNS in the app:
+# "8.8.8.8", "208.67.222.222", "114.114.114.114", "223.5.5.5"
+# You can replace one, more or all of them
+# Example: app_dns="208.67.222.222|4.4.4.4" "223.5.5.5|8.8.4.4"
+#app_dns="223.5.5.5|8.8.4.4"
+
 # Replace some of the app images
 # Use it for one or more sets: app_images="set1" "set2" "set3"
 #app_images="set1"