diff --git a/services/history-v1/storage/scripts/persist_and_expire_queues.sh b/services/history-v1/storage/scripts/persist_and_expire_queues.sh
index d9ff60ea31..cb96eff3e8 100644
--- a/services/history-v1/storage/scripts/persist_and_expire_queues.sh
+++ b/services/history-v1/storage/scripts/persist_and_expire_queues.sh
@@ -1,3 +1,3 @@
 #!/bin/sh
-node storage/scripts/persist_redis_chunks.js
+node storage/scripts/persist_redis_chunks.mjs
 node storage/scripts/expire_redis_chunks.js
diff --git a/services/history-v1/storage/scripts/persist_redis_chunks.js b/services/history-v1/storage/scripts/persist_redis_chunks.js
deleted file mode 100644
index 20963ba90f..0000000000
--- a/services/history-v1/storage/scripts/persist_redis_chunks.js
+++ /dev/null
@@ -1,70 +0,0 @@
-const logger = require('@overleaf/logger')
-const commandLineArgs = require('command-line-args')
-const redis = require('../lib/redis')
-const knex = require('../lib/knex.js')
-const knexReadOnly = require('../lib/knex_read_only.js')
-const { client } = require('../lib/mongodb.js')
-const { scanAndProcessDueItems } = require('../lib/scan')
-const persistBuffer = require('../lib/persist_buffer')
-const { claimPersistJob } = require('../lib/chunk_store/redis')
-const { loadGlobalBlobs } = require('../lib/blob_store/index.js')
-
-// Something is registering 11 listeners, over the limit of 10, which generates
-// a lot of warning noise.
-require('node:events').EventEmitter.defaultMaxListeners = 11
-
-const rclient = redis.rclientHistory
-
-const optionDefinitions = [{ name: 'dry-run', alias: 'd', type: Boolean }]
-const options = commandLineArgs(optionDefinitions)
-const DRY_RUN = options['dry-run'] || false
-
-logger.initialize('persist-redis-chunks')
-
-async function persistProjectAction(projectId) {
-  const job = await claimPersistJob(projectId)
-  // Set limits to force us to persist all of the changes.
-  const farFuture = new Date()
-  farFuture.setTime(farFuture.getTime() + 7 * 24 * 3600 * 1000)
-  const limits = {
-    maxChanges: 0,
-    minChangeTimestamp: farFuture,
-    maxChangeTimestamp: farFuture,
-  }
-  await persistBuffer(projectId, limits)
-  if (job && job.close) {
-    await job.close()
-  }
-}
-
-async function runPersistChunks() {
-  await loadGlobalBlobs()
-  await scanAndProcessDueItems(
-    rclient,
-    'persistChunks',
-    'persist-time',
-    persistProjectAction,
-    DRY_RUN
-  )
-}
-
-if (require.main === module) {
-  runPersistChunks()
-    .catch(err => {
-      logger.fatal(
-        { err, taskName: 'persistChunks' },
-        'Unhandled error in runPersistChunks'
-      )
-      process.exit(1)
-    })
-    .finally(async () => {
-      await redis.disconnect()
-      await client.close()
-      await knex.destroy()
-      await knexReadOnly.destroy()
-    })
-} else {
-  module.exports = {
-    runPersistChunks,
-  }
-}
diff --git a/services/history-v1/storage/scripts/persist_redis_chunks.mjs b/services/history-v1/storage/scripts/persist_redis_chunks.mjs
new file mode 100644
index 0000000000..41eea6fbd2
--- /dev/null
+++ b/services/history-v1/storage/scripts/persist_redis_chunks.mjs
@@ -0,0 +1,76 @@
+import logger from '@overleaf/logger'
+import commandLineArgs from 'command-line-args'
+import * as redis from '../lib/redis.js'
+import knex from '../lib/knex.js'
+import knexReadOnly from '../lib/knex_read_only.js'
+import { client } from '../lib/mongodb.js'
+import { scanAndProcessDueItems } from '../lib/scan.js'
+import persistBuffer from '../lib/persist_buffer.js'
+import { claimPersistJob } from '../lib/chunk_store/redis.js'
+import { loadGlobalBlobs } from '../lib/blob_store/index.js'
+import { EventEmitter } from 'node:events'
+import { fileURLToPath } from 'node:url'
+
+// Something is registering 11 listeners, over the limit of 10, which generates
+// a lot of warning noise.
+EventEmitter.defaultMaxListeners = 11
+
+const rclient = redis.rclientHistory
+
+const optionDefinitions = [{ name: 'dry-run', alias: 'd', type: Boolean }]
+const options = commandLineArgs(optionDefinitions)
+const DRY_RUN = options['dry-run'] || false
+
+logger.initialize('persist-redis-chunks')
+
+async function persistProjectAction(projectId) {
+  const job = await claimPersistJob(projectId)
+  // Set limits to force us to persist all of the changes.
+  const farFuture = new Date()
+  farFuture.setTime(farFuture.getTime() + 7 * 24 * 3600 * 1000)
+  const limits = {
+    maxChanges: 0,
+    minChangeTimestamp: farFuture,
+    maxChangeTimestamp: farFuture,
+  }
+  await persistBuffer(projectId, limits)
+  if (job && job.close) {
+    await job.close()
+  }
+}
+
+async function runPersistChunks() {
+  await loadGlobalBlobs()
+  await scanAndProcessDueItems(
+    rclient,
+    'persistChunks',
+    'persist-time',
+    persistProjectAction,
+    DRY_RUN
+  )
+}
+
+async function main() {
+  try {
+    await runPersistChunks()
+  } catch (err) {
+    logger.fatal(
+      { err, taskName: 'persistChunks' },
+      'Unhandled error in runPersistChunks'
+    )
+    process.exit(1)
+  } finally {
+    await redis.disconnect()
+    await client.close()
+    await knex.destroy()
+    await knexReadOnly.destroy()
+  }
+}
+
+// Check if the module is being run directly
+const currentScriptPath = fileURLToPath(import.meta.url)
+if (process.argv[1] === currentScriptPath) {
+  main()
+}
+
+export { runPersistChunks }
diff --git a/services/history-v1/test/acceptance/js/storage/persist_redis_chunks.test.js b/services/history-v1/test/acceptance/js/storage/persist_redis_chunks.test.js
index 3f2a4a390f..58261703bb 100644
--- a/services/history-v1/test/acceptance/js/storage/persist_redis_chunks.test.js
+++ b/services/history-v1/test/acceptance/js/storage/persist_redis_chunks.test.js
@@ -16,7 +16,7 @@ const { setupProjectState } = require('./support/redis')
 const { runScript } = require('./support/runscript')
 const persistChanges = require('../../../../storage/lib/persist_changes')
 
-const SCRIPT_PATH = 'storage/scripts/persist_redis_chunks.js'
+const SCRIPT_PATH = 'storage/scripts/persist_redis_chunks.mjs'
 
 describe('persist_redis_chunks script', function () {
   before(cleanup.everything)