diff --git a/src/utils/cron.ts b/src/utils/cron.ts
index a11f46f..ed3df73 100644
--- a/src/utils/cron.ts
+++ b/src/utils/cron.ts
@@ -1,6 +1,6 @@
 import { CronJob } from 'cron';
 
-import logger from '../log';
+import logger from '../log.js';
 
 export function createCron(
   name: string,
diff --git a/src/utils/healthcheck.ts b/src/utils/healthcheck.ts
index e954d09..8e0d8a4 100644
--- a/src/utils/healthcheck.ts
+++ b/src/utils/healthcheck.ts
@@ -1,9 +1,9 @@
 import checkDiskSpace from 'check-disk-space';
 
-import { FS_FREE_SPACE_MIN } from '../config';
-import logger from '../log';
-import { checkResourceUtilisation } from './resourceUtil';
-import sendWebhookMessage from './webhook';
+import { FS_FREE_SPACE_MIN } from '../config.js';
+import logger from '../log.js';
+import { checkResourceUtilisation } from './resourceUtil.js';
+import sendWebhookMessage from './webhook.js';
 
 export async function runHealthCheck(): Promise<void> {
   logger.info('Running health check');
diff --git a/src/utils/resourceUtil.ts b/src/utils/resourceUtil.ts
index 2f790ec..0fa83b5 100644
--- a/src/utils/resourceUtil.ts
+++ b/src/utils/resourceUtil.ts
@@ -1,8 +1,8 @@
 import { spawn } from 'child_process';
 import { cpus, freemem, loadavg, totalmem } from 'os';
 
-import { HIGH_LOAD_CRITICAL } from '../config';
-import sendWebhookMessage from './webhook';
+import { HIGH_LOAD_CRITICAL } from '../config.js';
+import sendWebhookMessage from './webhook.js';
 
 export async function checkResourceUtilisation(): Promise<void> {
   const loadAvg = loadavg();
diff --git a/src/utils/webhook.ts b/src/utils/webhook.ts
index 6fc553d..a9a2b97 100644
--- a/src/utils/webhook.ts
+++ b/src/utils/webhook.ts
@@ -2,8 +2,13 @@
 import AsyncRetry from 'async-retry';
 import Axios from 'axios';
 
-import { NODE_NAME, PDUTY_ROUTING_KEY, PING_ID, WEBHOOK_URL } from '../config';
-import logger from '../log';
+import {
+  NODE_NAME,
+  PDUTY_ROUTING_KEY,
+  PING_ID,
+  WEBHOOK_URL,
+} from '../config.js';
+import logger from '../log.js';
 
 export default async function sendWebhookMessage({
   name,