diff --git a/server/package.json b/server/package.json
index 08151d2..1324078 100644
--- a/server/package.json
+++ b/server/package.json
@@ -1,7 +1,7 @@
 {
   "name": "labwise-server",
   "version": "1.0.0",
-  "type": "commonjs",
+  "type": "module",
   "scripts": {
     "dev": "tsx watch src/index.ts",
     "build": "tsc",
diff --git a/server/src/auth/auth.ts b/server/src/auth/auth.ts
index db13ba7..3e9204b 100644
--- a/server/src/auth/auth.ts
+++ b/server/src/auth/auth.ts
@@ -3,7 +3,7 @@ import { hash as argon2Hash, verify as argon2Verify } from '@node-rs/argon2';
 import { kyselyAdapter } from '@better-auth/kysely-adapter';
 import { Kysely, PostgresDialect } from 'kysely';
 import { Pool } from 'pg';
-import { sendEmail, verificationEmailHtml, resetPasswordEmailHtml } from './email';
+import { sendEmail, verificationEmailHtml, resetPasswordEmailHtml } from './email.js';
 
 const db = new Kysely({
   dialect: new PostgresDialect({
diff --git a/server/src/auth/email.ts b/server/src/auth/email.ts
index c68aaf4..e19d2c9 100644
--- a/server/src/auth/email.ts
+++ b/server/src/auth/email.ts
@@ -1,7 +1,7 @@
 import FormData from 'form-data';
 import Mailgun from 'mailgun.js';
 
-const mailgun = new Mailgun(FormData);
+const mailgun = new (Mailgun as any)(FormData);
 const mg = mailgun.client({
   username: 'api',
   key: process.env.MAILGUN_API_KEY || '',
diff --git a/server/src/auth/middleware.ts b/server/src/auth/middleware.ts
index c121915..f827c2c 100644
--- a/server/src/auth/middleware.ts
+++ b/server/src/auth/middleware.ts
@@ -1,5 +1,5 @@
 import { Request, Response, NextFunction } from 'express';
-import { auth } from './auth';
+import { auth } from './auth.js';
 import { fromNodeHeaders } from 'better-auth/node';
 
 declare global {
diff --git a/server/src/db/migrate.ts b/server/src/db/migrate.ts
index acb08e3..c9d3194 100644
--- a/server/src/db/migrate.ts
+++ b/server/src/db/migrate.ts
@@ -1,6 +1,9 @@
-import { pool } from './pool';
+import { pool } from './pool.js';
 import fs from 'fs';
 import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 async function migrate() {
   const sql = fs.readFileSync(path.join(__dirname, 'schema.sql'), 'utf-8');
diff --git a/server/src/index.ts b/server/src/index.ts
index e93bd63..47853ee 100644
--- a/server/src/index.ts
+++ b/server/src/index.ts
@@ -2,12 +2,15 @@ import 'dotenv/config';
 import express from 'express';
 import cors from 'cors';
 import { toNodeHandler } from 'better-auth/node';
-import { auth } from './auth/auth';
-import { authRateLimiter, apiRateLimiter } from './auth/rateLimiter';
-import chemicalsRouter from './routes/chemicals';
-import protocolsRouter from './routes/protocols';
-import profileRouter from './routes/profile';
+import { auth } from './auth/auth.js';
+import { authRateLimiter, apiRateLimiter } from './auth/rateLimiter.js';
+import chemicalsRouter from './routes/chemicals.js';
+import protocolsRouter from './routes/protocols.js';
+import profileRouter from './routes/profile.js';
 import path from 'path';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 const app = express();
 const PORT = process.env.PORT || 3001;
diff --git a/server/src/routes/chemicals.ts b/server/src/routes/chemicals.ts
index 9dbc58a..cbab52f 100644
--- a/server/src/routes/chemicals.ts
+++ b/server/src/routes/chemicals.ts
@@ -1,6 +1,6 @@
 import { Router } from 'express';
-import { pool } from '../db/pool';
-import { requireAuth } from '../auth/middleware';
+import { pool } from '../db/pool.js';
+import { requireAuth } from '../auth/middleware.js';
 
 const router = Router();
 router.use(requireAuth);
diff --git a/server/src/routes/profile.ts b/server/src/routes/profile.ts
index a29889c..95103b9 100644
--- a/server/src/routes/profile.ts
+++ b/server/src/routes/profile.ts
@@ -1,6 +1,6 @@
 import { Router } from 'express';
-import { requireAuth } from '../auth/middleware';
-import { pool } from '../db/pool';
+import { requireAuth } from '../auth/middleware.js';
+import { pool } from '../db/pool.js';
 
 const router = Router();
 
diff --git a/server/src/routes/protocols.ts b/server/src/routes/protocols.ts
index 5be8940..dd01517 100644
--- a/server/src/routes/protocols.ts
+++ b/server/src/routes/protocols.ts
@@ -1,9 +1,12 @@
 import { Router } from 'express';
-import { pool } from '../db/pool';
-import { requireAuth } from '../auth/middleware';
+import { pool } from '../db/pool.js';
+import { requireAuth } from '../auth/middleware.js';
 import multer from 'multer';
 import path from 'path';
 import fs from 'fs';
+import { fileURLToPath } from 'url';
+
+const __dirname = path.dirname(fileURLToPath(import.meta.url));
 
 const router = Router();
 router.use(requireAuth);