diff --git a/packages/webapp/src/components/maps-page/action-dispatcher/import-dialog/index.tsx b/packages/webapp/src/components/maps-page/action-dispatcher/import-dialog/index.tsx
index 493a0078..02dafd17 100644
--- a/packages/webapp/src/components/maps-page/action-dispatcher/import-dialog/index.tsx
+++ b/packages/webapp/src/components/maps-page/action-dispatcher/import-dialog/index.tsx
@@ -79,7 +79,7 @@ const ImportDialog = ({ onClose }: CreateProps): React.ReactElement => {
                     }
                 }
 
-                const extensionFile = file.name.split('.')[1]
+                const extensionFile = file.name.split('.').pop();
                 const extensionAccept = ['wxml', 'mm'];
 
                 if ( extensionAccept.find(ext => ext === extensionFile) ) {