diff --git a/CHANGELOG.md b/CHANGELOG.md
index 305deed..d4bd612 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,10 @@
 Changelog
 =========
+
+## 4.0.0 - 2024-04-22
+* Craft 5 support
+
+
 ## 3.0.0 - 2022-05-25
 * Craft 4 and PHP 8 support
 
diff --git a/README.md b/README.md
index 04c005f..d1d53a5 100644
--- a/README.md
+++ b/README.md
@@ -6,7 +6,7 @@ This plugin provides an [Object Storage](https://help.fortrabbit.com/object-stor
 
 ## Requirements
 
-The 3.0 branch of this plugin requires Craft CMS 4.0 and PHP 8.0 or later. 
+The 4.0 release of this plugin requires Craft CMS 5 and PHP 8.0 or later. 
 
 
 ## Installation
@@ -53,9 +53,14 @@ Or browse to  CP > Settings > Plugins to enable the plugin.
 
 **4. Configure**
 
-Configure volumes under: Settings > Assets > **[New Volume]**.  
+Configure filesystems under: Settings > Filesystems >> **[New Filesystem]**.
 
-Select `fortrabbit Object Storage` as Volume Type and for the Base URL field use `$OBJECT_STORAGE_HOST` ENV variable. 
+- Select `fortrabbit Object Storage` as Filesystem Type.
+- For the Base URL field use `$OBJECT_STORAGE_HOST` ENV variable. 
 All other fields are pre-configured with ENV vars already. 
+- Set a value for Expires (Cache expiration period)
+
+Configure volumes under: Settings > Assets > **[New Volume]**.  
 
+- Select the filesystem created above as the Asset Filesystem. 
 
diff --git a/composer.json b/composer.json
index 7406ff8..9a783f1 100644
--- a/composer.json
+++ b/composer.json
@@ -19,10 +19,10 @@
   ],
   "require": {
     "php": "^8.0",
-    "craftcms/cms": "^4.0.0",
-    "craftcms/flysystem": "^1.0.0",
+    "craftcms/cms": "^5.0.0",
+    "craftcms/flysystem": "^2.0.0",
     "league/flysystem-aws-s3-v3": "^3.0.0",
-    "symfony/console": "^5.1"
+    "symfony/console": "^6.0 | ^7.0"
   },
   "require-dev": {
     "craftcms/phpstan": "dev-main",