diff --git a/setup/argparser.sh b/setup/argparser.sh
index 7ae2af4be..bc851b464 100644
--- a/setup/argparser.sh
+++ b/setup/argparser.sh
@@ -16,6 +16,7 @@ arg_tls_key=""
 arg_token=""
 arg_version=""
 arg_web_server_origin=""
+arg_backup_key=""
 arg_aws=""
 
 args=$(getopt -o "" -l "data:,retire" -n "$0" -- "$@")
@@ -42,6 +43,9 @@ EOF
         arg_restore_key=$(echo "$2" | $json restoreKey)
         [[ "${arg_restore_key}" == "null" ]] && arg_restore_key=""
 
+        arg_backup_key=$(echo "$2" | $json backupKey)
+        [[ "${arg_backup_key}" == "null" ]] && arg_backup_key=""
+
         arg_aws=$(echo "$2" | $json aws)
         [[ "${arg_aws}" == "null" ]] && arg_aws=""
 
diff --git a/setup/start.sh b/setup/start.sh
index cd32dc8ae..7036e36ad 100755
--- a/setup/start.sh
+++ b/setup/start.sh
@@ -139,6 +139,7 @@ cat > "${CONFIG_DIR}/cloudron.conf" <<CONF_END
         "port": 3306,
         "name": "box"
     },
+    "backupKey": "${arg_backup_key}",
     "aws": ${arg_aws}
 }
 CONF_END