diff --git a/packages/core/src/readers/PDFReader.ts b/packages/core/src/readers/PDFReader.ts
index caa9580b93cfb41232ffae331f19bf971fb784ff..bda8ab753ebd897c50349ab346d06f0273e20228 100644
--- a/packages/core/src/readers/PDFReader.ts
+++ b/packages/core/src/readers/PDFReader.ts
@@ -1,11 +1,11 @@
 import { fs } from "@llamaindex/env";
 import { Document } from "../Node.js";
-import type { BaseReader } from "./type.js";
+import type { FileReader } from "./type.js";
 
 /**
  * Read the text of a PDF
  */
-export class PDFReader implements BaseReader {
+export class PDFReader implements FileReader {
   async loadData(file: string): Promise<Document[]> {
     const content = await fs.readFile(file);
     const pages = await readPDF(content);
diff --git a/packages/core/src/readers/SimpleDirectoryReader.edge.ts b/packages/core/src/readers/SimpleDirectoryReader.edge.ts
index 5362391e418ce3a7bdd1f0182e097d9ea22446a6..589f455853c59d54ac1aede7a9fe6a69ed650b62 100644
--- a/packages/core/src/readers/SimpleDirectoryReader.edge.ts
+++ b/packages/core/src/readers/SimpleDirectoryReader.edge.ts
@@ -1,8 +1,8 @@
-import { fs, path } from "@llamaindex/env";
+import { path } from "@llamaindex/env";
 import { Document, type Metadata } from "../Node.js";
 import { walk } from "../storage/FileSystem.js";
 import { TextFileReader } from "./TextFileReader.js";
-import type { BaseReader } from "./type.js";
+import type { BaseReader, FileReader } from "./type.js";
 import pLimit from "./utils.js";
 
 type ReaderCallback = (
@@ -20,13 +20,13 @@ enum ReaderStatus {
 export type SimpleDirectoryReaderLoadDataParams = {
   directoryPath: string;
   // Fallback Reader, defaults to TextFileReader
-  defaultReader?: BaseReader | null;
+  defaultReader?: FileReader | null;
   // Map file extensions individually to readers
-  fileExtToReader?: Record<string, BaseReader>;
+  fileExtToReader?: Record<string, FileReader>;
   // Number of workers, defaults to 1. Must be between 1 and 9.
   numWorkers?: number;
   // Overrides reader for all file extensions
-  overrideReader?: BaseReader;
+  overrideReader?: FileReader;
 };
 
 type ProcessFileParams = Omit<
@@ -115,7 +115,7 @@ export class SimpleDirectoryReader implements BaseReader {
         return [];
       }
 
-      let reader: BaseReader;
+      let reader: FileReader;
 
       if (params.overrideReader) {
         reader = params.overrideReader;
@@ -135,7 +135,7 @@ export class SimpleDirectoryReader implements BaseReader {
         return [];
       }
 
-      const fileDocs = await reader.loadData(filePath, fs);
+      const fileDocs = await reader.loadData(filePath);
       fileDocs.forEach(addMetaData(filePath));
 
       // Observer can still cancel addition of the resulting docs from this file
diff --git a/packages/core/src/readers/SimpleDirectoryReader.ts b/packages/core/src/readers/SimpleDirectoryReader.ts
index 70d49ef3be414d935d308a077e826597ac89d5ca..10b3b9bdbcb071681167eba78a01ad6ea4572ded 100644
--- a/packages/core/src/readers/SimpleDirectoryReader.ts
+++ b/packages/core/src/readers/SimpleDirectoryReader.ts
@@ -10,9 +10,9 @@ import {
   type SimpleDirectoryReaderLoadDataParams,
 } from "./SimpleDirectoryReader.edge.js";
 import { TextFileReader } from "./TextFileReader.js";
-import type { BaseReader } from "./type.js";
+import type { FileReader } from "./type.js";
 
-export const FILE_EXT_TO_READER: Record<string, BaseReader> = {
+export const FILE_EXT_TO_READER: Record<string, FileReader> = {
   txt: new TextFileReader(),
   pdf: new PDFReader(),
   csv: new PapaCSVReader(),
diff --git a/packages/core/src/readers/TextFileReader.ts b/packages/core/src/readers/TextFileReader.ts
index 7d51ac53b8fd6390e81f34b8bcd63325860267f4..0b91e69bfde1520dbc853679a6300bae88e567cd 100644
--- a/packages/core/src/readers/TextFileReader.ts
+++ b/packages/core/src/readers/TextFileReader.ts
@@ -1,12 +1,12 @@
 import { fs } from "@llamaindex/env";
 import { Document } from "../Node.js";
-import type { BaseReader } from "./type.js";
+import type { FileReader } from "./type.js";
 
 /**
  * Read a .txt file
  */
 
-export class TextFileReader implements BaseReader {
+export class TextFileReader implements FileReader {
   async loadData(file: string): Promise<Document[]> {
     const dataBuffer = await fs.readFile(file, "utf-8");
     return [new Document({ text: dataBuffer, id_: file })];