diff --git a/packages/dbml-core/src/transform/index.js b/packages/dbml-core/src/transform/index.ts
similarity index 61%
rename from packages/dbml-core/src/transform/index.js
rename to packages/dbml-core/src/transform/index.ts
index 7505936c2..9a42cc794 100644
--- a/packages/dbml-core/src/transform/index.js
+++ b/packages/dbml-core/src/transform/index.ts
@@ -2,12 +2,6 @@ import { Compiler } from '@dbml/parse';
 
 /**
  * Renames a table in DBML code using symbol table and token-based replacement.
- *
- * @param {string | { schema?: string; table: string }} oldName - The current table name
- * @param {string | { schema?: string; table: string }} newName - The new table name
- * @param {string} dbmlCode - The DBML code containing the table
- * @returns {string} The updated DBML code with the renamed table
- *
  * @example
  * // String format
  * renameTable('users', 'customers', dbmlCode);
@@ -18,7 +12,11 @@ import { Compiler } from '@dbml/parse';
  * renameTable({ table: 'users' }, { table: 'customers' }, dbmlCode);
  * renameTable({ schema: 'auth', table: 'users' }, { schema: 'auth', table: 'customers' }, dbmlCode);
  */
-export function renameTable (oldName, newName, dbmlCode) {
+export function renameTable (
+  oldName:string | { schema?: string; table: string },
+  newName: string | { schema?: string; table: string },
+  dbmlCode: string,
+): string {
   const compiler = new Compiler();
   compiler.setSource(dbmlCode);
   return compiler.renameTable(oldName, newName);
diff --git a/packages/dbml-core/types/index.d.ts b/packages/dbml-core/types/index.d.ts
index 515349b82..94f338fd1 100644
--- a/packages/dbml-core/types/index.d.ts
+++ b/packages/dbml-core/types/index.d.ts
@@ -2,11 +2,7 @@ import ModelExporter from './export/ModelExporter';
 import Parser from './parse/Parser';
 import importer from './import';
 import exporter from './export';
-import {
-  renameTable,
-} from './transform';
 export {
-  renameTable,
   importer,
   exporter,
   ModelExporter,
diff --git a/packages/dbml-core/types/transform/index.d.ts b/packages/dbml-core/types/transform/index.d.ts
deleted file mode 100644
index 0cf165118..000000000
--- a/packages/dbml-core/types/transform/index.d.ts
+++ /dev/null
@@ -1,7 +0,0 @@
-export type TableNameInput = string | { schema?: string; table: string };
-
-export function renameTable(
-  oldName: TableNameInput,
-  newName: TableNameInput,
-  dbmlCode: string
-): string;