diff --git a/Classes/Driver/AmazonS3Driver.php b/Classes/Driver/AmazonS3Driver.php
index 85798518..cc35dcb4 100644
--- a/Classes/Driver/AmazonS3Driver.php
+++ b/Classes/Driver/AmazonS3Driver.php
@@ -1126,12 +1126,14 @@ protected function initializeClient()
         $configuration = [
             'version' => '2006-03-01',
             'region' => $this->configuration['region'] ?? '',
-            'credentials' => [
-                'key' => $this->configuration['key'] ?? '',
-                'secret' => $this->configuration['secretKey'] ?? '',
-            ],
             'validation' => false,
         ];
+        if (!empty($this->configuration['key']) || !empty($this->configuration['secretKey'])) {
+            $configuration['credentials'] = [
+                'key' => $this->configuration['key'] ?? '',
+                'secret' => $this->configuration['secretKey'] ?? '',
+            ];
+        }
         if (!empty($GLOBALS['TYPO3_CONF_VARS']['HTTP']['proxy'])) {
             $configuration['http']['proxy'] = $GLOBALS['TYPO3_CONF_VARS']['HTTP']['proxy'];
         }
diff --git a/Documentation/Administration/DriverConfiguration/Index.rst b/Documentation/Administration/DriverConfiguration/Index.rst
index 2b2492c2..70613538 100755
--- a/Documentation/Administration/DriverConfiguration/Index.rst
+++ b/Documentation/Administration/DriverConfiguration/Index.rst
@@ -17,7 +17,7 @@ Add the following configurations:
 
 - Region: The region of your bucket (avoid dots in the bucket name)
 
-- Key and secret key of your AWS account (see security credentials -> access keys)
+- Key and secret key of your AWS account (optional, you can also use IAM roles or environment variables)
 
 - Public base url (optional): this is the public url of your bucket, if empty its default to "bucketname.s3.amazonaws.com"
 
diff --git a/Documentation/Introduction/Index.rst b/Documentation/Introduction/Index.rst
index 6414c156..1f1ed999 100644
--- a/Documentation/Introduction/Index.rst
+++ b/Documentation/Introduction/Index.rst
@@ -15,8 +15,6 @@ You can create a file storage which allows you to upload/download and link the f
 
 Requires TYPO3 CMS 10.4 or higher
 
-German blog post: `TYPO3 CDN with AWS S3 <http://www.andersundsehr.com/blog/technik/typo3-performance-optimierung-durch-cdn>`_
-
 Issue tracking: `GitHub Issues: AWS S3 FAL Driver <https://github.com/andersundsehr/aus_driver_amazon_s3/issues>`_
 
 
diff --git a/Documentation/Settings.cfg b/Documentation/Settings.cfg
index fda1d2a0..41579b0b 100644
--- a/Documentation/Settings.cfg
+++ b/Documentation/Settings.cfg
@@ -1,7 +1,7 @@
 [general]
 
 project = Amazon AWS S3 FAL driver (CDN)
-copyright = 2021 different.technology
+copyright = 2022 different.technology
 project_home         = https://github.com/andersundsehr/aus_driver_amazon_s3
 project_issues       = https://github.com/andersundsehr/aus_driver_amazon_s3/issues
 project_repository   = https://github.com/andersundsehr/aus_driver_amazon_s3
diff --git a/Documentation/Settings.yml b/Documentation/Settings.yml
index e331f887..e79d520a 100644
--- a/Documentation/Settings.yml
+++ b/Documentation/Settings.yml
@@ -4,7 +4,7 @@
 
 ---
 conf.py:
-  copyright: 2019
+  copyright: 2022
   project: Amazon AWS S3 FAL driver (CDN)
   version: 1.12
   release: 1.12.0
diff --git a/README.md b/README.md
index dd84d581..41a13e89 100644
--- a/README.md
+++ b/README.md
@@ -40,7 +40,7 @@ Add the following configurations:
 
 -   Bucket: The name of your AWS S3 bucket
 -   Region: The region of your bucket (avoid dots in the bucket name)
--   Key and secret key of your AWS account (see security credentials -&gt; access keys)
+-   Key and secret key of your AWS account (optional, you can also use IAM roles or environment variables)
 -   Public base url (optional): this is the public url of your bucket, if empty its default to “bucketname.s3.amazonaws.com”
 -   Protocol: network protocol (https://, http:// or auto detection)