diff --git a/src/SlugGenerator.ts b/src/SlugGenerator.ts
index d13b2a6..0487c45 100644
--- a/src/SlugGenerator.ts
+++ b/src/SlugGenerator.ts
@@ -1,7 +1,8 @@
 import config from "config";
-import FileModel from "./models/FileModel";
-import {ServerError} from "swaf/HttpError";
 import {nanoid} from "nanoid";
+import {ServerError} from "swaf/HttpError";
+
+import FileModel from "./models/FileModel.js";
 
 export default async function generateSlug(tries: number): Promise<string> {
     let i = 0;
diff --git a/src/controllers/AboutController.ts b/src/controllers/AboutController.ts
index 4b92b19..528b580 100644
--- a/src/controllers/AboutController.ts
+++ b/src/controllers/AboutController.ts
@@ -1,5 +1,5 @@
-import Controller from "swaf/Controller";
 import {Request, Response} from "express";
+import Controller from "swaf/Controller";
 
 export default class AboutController extends Controller {
     public routes(): void {
diff --git a/src/controllers/LinkController.ts b/src/controllers/LinkController.ts
index ef1057d..f8081dd 100644
--- a/src/controllers/LinkController.ts
+++ b/src/controllers/LinkController.ts
@@ -1,17 +1,18 @@
-import Controller from "swaf/Controller";
-import {NextFunction, Request, Response} from "express";
-import {BadRequestError, NotFoundHttpError, ServerError} from "swaf/HttpError";
 import config from "config";
-import {RequireRequestAuthMiddleware} from "swaf/auth/AuthComponent";
-import URLRedirect from "../models/URLRedirect";
-import URLRedirectController from "./URLRedirectController";
-import FileModel from "../models/FileModel";
-import generateSlug from "../SlugGenerator";
-import FileController, {FileUploadFormMiddleware} from "./FileController";
+import {NextFunction, Request, Response} from "express";
 import * as fs from "fs";
-import {encodeRFC5987ValueChars} from "../Utils";
-import {promisify} from "util";
+import {RequireRequestAuthMiddleware} from "swaf/auth/AuthComponent";
+import Controller from "swaf/Controller";
+import {BadRequestError, NotFoundHttpError, ServerError} from "swaf/HttpError";
 import {logger} from "swaf/Logger";
+import {promisify} from "util";
+
+import FileModel from "../models/FileModel.js";
+import URLRedirect from "../models/URLRedirect.js";
+import generateSlug from "../SlugGenerator.js";
+import {encodeRFC5987ValueChars} from "../Utils.js";
+import FileController, {FileUploadFormMiddleware} from "./FileController.js";
+import URLRedirectController from "./URLRedirectController.js";
 
 export default class LinkController extends Controller {
     public routes(): void {
@@ -75,7 +76,13 @@ export default class LinkController extends Controller {
     protected async putFile(req: Request, res: Response, next: NextFunction): Promise<void> {
         if (req.body.type !== 'file') return next();
         const slug = req.params.slug;
-        if (!slug) throw new BadRequestError('Cannot put without a slug.', 'Either provide a slug or use POST method instead.', req.url);
+        if (!slug) {
+            throw new BadRequestError(
+                'Cannot put without a slug.',
+                'Either provide a slug or use POST method instead.',
+                req.url,
+            );
+        }
 
         await FileController.handleFileUpload(slug, req, res, true);
     }
diff --git a/src/migrations/CreateAuthTokensTable.ts b/src/migrations/CreateAuthTokensTable.ts
index ea81d77..7a0452a 100644
--- a/src/migrations/CreateAuthTokensTable.ts
+++ b/src/migrations/CreateAuthTokensTable.ts
@@ -1,6 +1,7 @@
 import Migration from "swaf/db/Migration";
 import ModelFactory from "swaf/db/ModelFactory";
-import AuthToken from "../models/AuthToken";
+
+import AuthToken from "../models/AuthToken.js";
 
 export default class CreateAuthTokensTable extends Migration {
     public async install(): Promise<void> {
diff --git a/src/migrations/CreateFilesTable.ts b/src/migrations/CreateFilesTable.ts
index f45516f..e84c89d 100644
--- a/src/migrations/CreateFilesTable.ts
+++ b/src/migrations/CreateFilesTable.ts
@@ -1,6 +1,7 @@
 import Migration from "swaf/db/Migration";
 import ModelFactory from "swaf/db/ModelFactory";
-import FileModel from "../models/FileModel";
+
+import FileModel from "../models/FileModel.js";
 
 export default class CreateFilesTable extends Migration {
     public async install(): Promise<void> {
diff --git a/src/migrations/CreateUrlRedirectsTable.ts b/src/migrations/CreateUrlRedirectsTable.ts
index 249e51a..57b086b 100644
--- a/src/migrations/CreateUrlRedirectsTable.ts
+++ b/src/migrations/CreateUrlRedirectsTable.ts
@@ -1,6 +1,7 @@
 import Migration from "swaf/db/Migration";
 import ModelFactory from "swaf/db/ModelFactory";
-import URLRedirect from "../models/URLRedirect";
+
+import URLRedirect from "../models/URLRedirect.js";
 
 export default class CreateUrlRedirectsTable extends Migration {
     public async install(): Promise<void> {
diff --git a/src/migrations/ReplaceTtlWithExpiresAtFilesTable.ts b/src/migrations/ReplaceTtlWithExpiresAtFilesTable.ts
index 722d853..ef745ab 100644
--- a/src/migrations/ReplaceTtlWithExpiresAtFilesTable.ts
+++ b/src/migrations/ReplaceTtlWithExpiresAtFilesTable.ts
@@ -1,5 +1,6 @@
 import Migration from "swaf/db/Migration";
-import FileModel from "../models/FileModel";
+
+import FileModel from "../models/FileModel.js";
 
 export default class ReplaceTtlWithExpiresAtFilesTable extends Migration {
     public async install(): Promise<void> {
diff --git a/src/models/AuthToken.ts b/src/models/AuthToken.ts
index 8e1465c..329a85d 100644
--- a/src/models/AuthToken.ts
+++ b/src/models/AuthToken.ts
@@ -1,7 +1,7 @@
-import Model from "swaf/db/Model";
+import {nanoid} from "nanoid";
 import AuthProof from "swaf/auth/AuthProof";
 import User from "swaf/auth/models/User";
-import {nanoid} from "nanoid";
+import Model from "swaf/db/Model";
 
 export default class AuthToken extends Model implements AuthProof<User> {
     public id?: number = undefined;
diff --git a/src/models/URLRedirect.ts b/src/models/URLRedirect.ts
index 8e01dd9..acf06a8 100644
--- a/src/models/URLRedirect.ts
+++ b/src/models/URLRedirect.ts
@@ -2,10 +2,9 @@ import config from "config";
 import {Request} from "express";
 import User from "swaf/auth/models/User";
 import {route} from "swaf/common/Routing";
-import Controller from "swaf/Controller";
 import Model from "swaf/db/Model";
 
-import FileModel from "./FileModel";
+import FileModel from "./FileModel.js";
 
 export default class URLRedirect extends Model {
     public static get table(): string {