diff --git a/README.md b/README.md
index 6c39fd1..3d70d54 100644
--- a/README.md
+++ b/README.md
@@ -114,6 +114,7 @@ Be sure to view the following repositories to understand all the customizable op
 | `BACKUP_LOCATION`      | Backup to `FILESYSTEM` or `S3` compatible services like S3, Minio, Wasabi - Default `FILESYSTEM`                                                                                                   |
 | `COMPRESSION`          | Use either Gzip `GZ`, Bzip2 `BZ`, XZip `XZ`, ZSTD `ZSTD` or none `NONE` - Default `GZ`                                                                                                             |
 | `COMPRESSION_LEVEL`    | Numberical value of what level of compression to use, most allow `1` to `9` except for `ZSTD` which allows for `1` to `19` - Default `3`                                                           |
+| `DB_AUTH`              | (Mongo Only - Optional) Authentication Database |
 | `DB_TYPE`              | Type of DB Server to backup `couch` `influx` `mysql` `pgsql` `mongo` `redis` `sqlite3`                                                                                                             |
 | `DB_HOST`              | Server Hostname e.g. `mariadb`. For `sqlite3`, full path to DB file e.g. `/backup/db.sqlite3`                                                                                                      |
 | `DB_NAME`              | Schema Name e.g. `database`                                                                                                                                                                        |
diff --git a/install/etc/services.available/10-db-backup/run b/install/etc/services.available/10-db-backup/run
index a2b3d72..b2407df 100755
--- a/install/etc/services.available/10-db-backup/run
+++ b/install/etc/services.available/10-db-backup/run
@@ -35,7 +35,6 @@ case "$dbtype" in
         dbport=${DB_PORT:-27017}
         [[ ( -n "${DB_USER}" ) || ( -n "${DB_USER_FILE}" ) ]] && file_env 'DB_USER'
         [[ ( -n "${DB_PASS}" ) || ( -n "${DB_PASS_FILE}" ) ]] && file_env 'DB_PASS'
-    ;;
     "mysql" | "MYSQL" | "mariadb" | "MARIADB")
         dbtype=mysql
         dbport=${DB_PORT:-3306}
@@ -118,6 +117,7 @@ case "$dbtype" in
         [[ ( -n "${DB_USER}" ) ]] && MONGO_USER_STR=" --username ${dbuser}"
         [[ ( -n "${DB_PASS}" ) ]] && MONGO_PASS_STR=" --password ${dbpass}"
         [[ ( -n "${DB_NAME}" ) ]] && MONGO_DB_STR=" --db ${dbname}"
+        [[ ( -n "${DB_AUTH}" ) ]] && MONGO_AUTH_STR=" --authenticationDatabase ${DB_AUTH}"
     ;;
     "mysql" )
         [[ ( -n "${DB_PASS}" ) ]] && export MYSQL_PWD=${dbpass}
@@ -164,7 +164,7 @@ backup_mongo() {
         target=${dbtype}_${dbname}_${dbhost}_${now}.archivegz
         mongo_compression="--gzip"
     fi
-    mongodump --archive=${tmpdir}/${target} ${mongo_compression} --host ${dbhost} --port ${dbport} ${MONGO_USER_STR}${MONGO_PASS_STR}${MONGO_DB_STR} ${EXTRA_OPTS}
+    mongodump --archive=${tmpdir}/${target} ${mongo_compression} --host ${dbhost} --port ${dbport} ${MONGO_USER_STR}${MONGO_PASS_STR}${MONGO_AUTH_STR}${MONGO_DB_STR} ${EXTRA_OPTS}
     exit_code=$?
     cd ${tmpdir}
     generate_md5