diff --git a/libraries/object-persistor/src/S3Persistor.js b/libraries/object-persistor/src/S3Persistor.js
index 1a8c326be4..b34afcf1e9 100644
--- a/libraries/object-persistor/src/S3Persistor.js
+++ b/libraries/object-persistor/src/S3Persistor.js
@@ -523,7 +523,7 @@ class S3Persistor extends AbstractPersistor {
     if (this.settings.endpoint) {
       const endpoint = new URL(this.settings.endpoint)
       options.endpoint = this.settings.endpoint
-      options.sslEnabled = endpoint.protocol === 'https'
+      options.sslEnabled = endpoint.protocol === 'https:'
     }
 
     // path-style access is only used for acceptance tests
@@ -537,6 +537,14 @@ class S3Persistor extends AbstractPersistor {
       }
     }
 
+    if (options.sslEnabled && this.settings.ca && !options.httpOptions?.agent) {
+      options.httpOptions = options.httpOptions || {}
+      options.httpOptions.agent = new https.Agent({
+        rejectUnauthorized: true,
+        ca: this.settings.ca,
+      })
+    }
+
     return options
   }
 
diff --git a/package-lock.json b/package-lock.json
index 613e000184..02a10978e9 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -39546,7 +39546,6 @@
       },
       "devDependencies": {
         "@google-cloud/storage": "^6.10.1",
-        "aws-sdk": "^2.718.0",
         "chai": "^4.3.6",
         "chai-as-promised": "^7.1.1",
         "mocha": "^10.2.0",
@@ -50110,7 +50109,6 @@
         "@overleaf/object-persistor": "*",
         "@overleaf/settings": "*",
         "@overleaf/stream-utils": "^0.1.0",
-        "aws-sdk": "^2.718.0",
         "body-parser": "^1.20.3",
         "bunyan": "^1.8.15",
         "chai": "^4.3.6",
diff --git a/services/filestore/package.json b/services/filestore/package.json
index 4bfe446bf6..ddf4bf3405 100644
--- a/services/filestore/package.json
+++ b/services/filestore/package.json
@@ -36,7 +36,6 @@
   },
   "devDependencies": {
     "@google-cloud/storage": "^6.10.1",
-    "aws-sdk": "^2.718.0",
     "chai": "^4.3.6",
     "chai-as-promised": "^7.1.1",
     "mocha": "^10.2.0",
diff --git a/services/filestore/test/acceptance/js/FilestoreTests.js b/services/filestore/test/acceptance/js/FilestoreTests.js
index bdab787393..2317fd515f 100644
--- a/services/filestore/test/acceptance/js/FilestoreTests.js
+++ b/services/filestore/test/acceptance/js/FilestoreTests.js
@@ -7,7 +7,6 @@ const Path = require('path')
 const FilestoreApp = require('./FilestoreApp')
 const TestHelper = require('./TestHelper')
 const fetch = require('node-fetch')
-const S3 = require('aws-sdk/clients/s3')
 const { promisify } = require('util')
 const { Storage } = require('@google-cloud/storage')
 const streamifier = require('streamifier')
@@ -43,6 +42,7 @@ const {
   PerProjectEncryptedS3Persistor,
   RootKeyEncryptionKey,
 } = require('@overleaf/object-persistor/src/PerProjectEncryptedS3Persistor')
+const { S3Persistor } = require('@overleaf/object-persistor/src/S3Persistor')
 const crypto = require('crypto')
 
 describe('Filestore', function () {
@@ -521,18 +521,11 @@ describe('Filestore', function () {
             bucketName = `random-bucket-${new ObjectId().toString()}`
             fileUrl = `${filestoreUrl}/bucket/${bucketName}/key/${fileId}`
 
-            const cfg = s3Config()
-            const s3ClientSettings = {
-              credentials: {
-                accessKeyId: process.env.MINIO_ROOT_USER,
-                secretAccessKey: process.env.MINIO_ROOT_PASSWORD,
-              },
-              endpoint: cfg.endpoint,
-              httpOptions: cfg.httpOptions,
-              s3ForcePathStyle: cfg.pathStyle,
-            }
-
-            const s3 = new S3(s3ClientSettings)
+            const s3 = new S3Persistor({
+              ...s3Config(),
+              key: process.env.MINIO_ROOT_USER,
+              secret: process.env.MINIO_ROOT_PASSWORD,
+            })._getClientForBucket(bucketName)
             await s3
               .createBucket({
                 Bucket: bucketName,
@@ -1263,16 +1256,8 @@ describe('Filestore', function () {
         })
 
         let s3Client
-        before('create s3Client', function () {
-          const cfg = s3Config()
-          const s3ClientSettings = {
-            accessKeyId: cfg.key,
-            secretAccessKey: cfg.secret,
-            endpoint: cfg.endpoint,
-            httpOptions: cfg.httpOptions,
-            s3ForcePathStyle: cfg.pathStyle,
-          }
-          s3Client = new S3(s3ClientSettings)
+        before('create s3 client', function () {
+          s3Client = new S3Persistor(s3Config())._getClientForBucket('')
         })
 
         async function checkDEKStorage({
diff --git a/services/filestore/test/acceptance/js/TestConfig.js b/services/filestore/test/acceptance/js/TestConfig.js
index 07ad3aa1bf..dfedad7dcf 100644
--- a/services/filestore/test/acceptance/js/TestConfig.js
+++ b/services/filestore/test/acceptance/js/TestConfig.js
@@ -1,7 +1,6 @@
 const fs = require('fs')
 const Path = require('path')
 const crypto = require('crypto')
-const https = require('https')
 const {
   RootKeyEncryptionKey,
 } = require('@overleaf/object-persistor/src/PerProjectEncryptedS3Persistor')
@@ -12,12 +11,7 @@ function s3BaseConfig() {
     endpoint: process.env.AWS_S3_ENDPOINT,
     pathStyle: true,
     partSize: 100 * 1024 * 1024,
-    httpOptions: {
-      agent: new https.Agent({
-        rejectUnauthorized: true,
-        ca: [fs.readFileSync('/certs/public.crt')],
-      }),
-    },
+    ca: [fs.readFileSync('/certs/public.crt')],
   }
 }