diff --git a/package.json b/package.json
index 9623ad4..a719fb2 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "@flyingeek/lidojs",
-  "version": "1.6.22",
+  "version": "1.6.23",
   "description": "convert Lido OFP text files",
   "publishConfig": {
     "registry": "https://npm.pkg.github.com/"
diff --git a/src/index.js b/src/index.js
index 5486d1e..dcbda24 100644
--- a/src/index.js
+++ b/src/index.js
@@ -10,4 +10,4 @@ export {GEO_HASH_GRID_SIZE, GeoGridIndex} from "./modules/geoindex";
 export {ogimetRoute, ogimetData} from "./modules/ogimet";
 export {months3} from "./modules/ofp_infos";
 export {StringExtractException, extract} from "./modules/ofp_extensions";
-export {iata2GeoPoint, icao2iata, iata2icao} from "./modules/iata2icao";
+export {iata2GeoPoint, icao2iata, iata2icao, tzOffset, iata2tz} from "./modules/iata2icao";