diff --git a/README.md b/README.md
index c56b378..b853a26 100644
--- a/README.md
+++ b/README.md
@@ -12,7 +12,7 @@ It is a wrapper for PHP’s [hexdec()](http://php.net/manual/en/function.hexdec.
 
 ## Requirements
 
-This plugin requires Craft CMS 4.0.0+ or 5.0.0+.
+This plugin requires Craft CMS 4.0.0+ or 5.0.0+ or 6.0.0-alpha.1+ with the `craftcms/yii2-adapter` package.
 
 ## Installation
 
diff --git a/composer.json b/composer.json
index 217e27a..187707d 100644
--- a/composer.json
+++ b/composer.json
@@ -19,13 +19,13 @@
     "email": "support@craftcms.com",
     "issues": "https://github.com/craftcms/hexdec/issues?state=open",
     "source": "https://github.com/craftcms/hexdec",
-    "docs": "https://github.com/craftcms/hexdec/blob/v2/README.md",
-    "rss": "https://github.com/craftcms/hexdec/commits/master.atom"
+    "docs": "https://github.com/craftcms/hexdec/blob/3.x/README.md",
+    "rss": "https://github.com/craftcms/hexdec/commits/3.x.atom"
   },
   "minimum-stability": "dev",
   "prefer-stable": true,
   "require": {
-    "craftcms/cms": "^4.0.0-RC3|^5.0.0-beta.1"
+    "craftcms/cms": "^4.0.0-RC3|^5.0.0-beta.1|^6.0.0-alpha.1"
   },
   "require-dev": {
     "craftcms/ecs": "dev-main",
@@ -45,7 +45,7 @@
   "extra": {
     "name": "Hexdec",
     "handle": "hexdec",
-    "documentationUrl": "https://github.com/craftcms/hexdec/blob/v2/README.md"
+    "documentationUrl": "https://github.com/craftcms/hexdec/blob/3.x/README.md"
   },
   "config": {
     "platform": {