diff --git a/types/session-file-store/index.d.ts b/types/session-file-store/index.d.ts
index 07afc37c1f..0cbe77d9ef 100644
--- a/types/session-file-store/index.d.ts
+++ b/types/session-file-store/index.d.ts
@@ -1,14 +1,21 @@
-// Type definitions for express session-file-store 1.0
+// Type definitions for express session-file-store 1.2
 // Project: https://github.com/valery-barysok/session-file-store
 // Definitions by: Gevik Babakhani <https://github.com/blendsdk>
+//                 Junyoung Choi <https://github.com/rokt33r>
 // Definitions: https://github.com/DefinitelyTyped/DefinitelyTyped
 // TypeScript Version: 2.2
 
-/// <reference types="express-session" />
+import * as express from "express";
+import * as session from "express-session";
 
-export = FileStore;
+export = f;
 
-declare namespace FileStore {
+declare function f(options: (options?: session.SessionOptions) => express.RequestHandler): f.FileStore;
+
+declare namespace f {
+    interface FileStore {
+        new (options?: Options): session.Store;
+    }
     /**
      * FileStore Options
      */
@@ -121,51 +128,3 @@ declare namespace FileStore {
         keyFunction?(secret: string, sessionId: string): string;
     }
 }
-
-/**
- * Session file store is a provision for storing session data in
- * the session file
- */
-declare class FileStore {
-    /**
-     * Creates an instance of FileStore.
-     */
-    constructor(options: FileStore.Options);
-
-    /**
-     * Attempts to fetch session from a session file by the given `sessionId`
-     */
-    get(sessionId: string, callback: (err: any, session: Express.Session) => void): void;
-
-    /**
-     * Attempts to commit the given session associated with the given `sessionId` to a session file
-     */
-    set(sessionId: string, session: Express.Session, callback: (err: any) => void): void;
-
-    /**
-     * Touch the given session object associated with the given `sessionId`
-     */
-    touch(sessionId: string, session: Express.Session, callback: (err: any) => void): void;
-
-    /**
-     * Attempts to unlink a given session by its id
-     */
-    destroy(sessionId: string, callback: (err: any) => void): void;
-
-    /**
-     * Attempts to fetch number of the session files
-     */
-    length(callback: (err: any, length: number) => void): void;
-
-    /**
-     * Attempts to clear out all of the existing session files
-     */
-    clear(callback: (err: any) => void): void;
-
-    list(callback: (err: any, files: string[]) => void): void;
-
-    /**
-     * Attempts to detect whether a session file is already expired or not
-     */
-    expired(sessionId: string, callback: (errr: any, isExpired: boolean) => void): void;
-}
diff --git a/types/session-file-store/session-file-store-tests.ts b/types/session-file-store/session-file-store-tests.ts
index 50d30da2ac..001aacca60 100644
--- a/types/session-file-store/session-file-store-tests.ts
+++ b/types/session-file-store/session-file-store-tests.ts
@@ -1,11 +1,11 @@
-import FileStore = require("session-file-store");
+import session = require("express-session");
+import f = require("session-file-store");
 
-const options: FileStore.Options = {
+const options: f.Options = {
     path: "./tmp/sessions/",
     logFn: (a: string) => {
     }
 };
+const FileStore = f(session);
 
-const sessionStore = new FileStore(options);
-
-sessionStore.list((err: any, file: string[]) => {});
+const sessionStore: session.Store = new FileStore(options);