diff --git a/ReadMe.md b/ReadMe.md
index 6d98c37..29ba133 100644
--- a/ReadMe.md
+++ b/ReadMe.md
@@ -1,6 +1,6 @@
 # Composer package from Smarty Extended
 
-This is an updated package for smarty\smarty
+This is an updated package for [smarty\smarty](https://github.com/smarty-php/smarty/)
 
 Adds:
 
@@ -20,6 +20,9 @@ composer config repositories.git.egplusww.jp.Composer composer https://git.egplu
 Alternative setup composer local zip file repot:
 `composer config repositories.composer.egplusww.jp composer http://composer.egplusww.jp`
 
+> [!notice]
+> Requires mbstring extension installed, will not use the symfony/polyfill-mbstring
+
 ## Install package
 
 `composer require egrajp/smarty-extended:^5`
diff --git a/composer.json b/composer.json
index 13b7c70..606b20f 100644
--- a/composer.json
+++ b/composer.json
@@ -1,11 +1,11 @@
 {
     "name": "egrajp/smarty-extended",
-    "description": "Smarty, extended with gettext, checkbox/radio labels and index numbers",
+    "description": "Smarty, extended with gettext, checkbox/radio labels and index numbers. Based on the smarty project: https://github.com/smarty-php/smarty/",
     "type": "library",
     "keywords": [
         "templating"
     ],
-    "homepage": "https://github.com/smarty-php/smarty/",
+    "homepage": "https://github.com/TBWA-EGPlus-Japan/Composer.smarty-extended",
     "license": "LGPL-3.0",
     "autoload": {
         "files": [
@@ -28,7 +28,11 @@
             "url": "https://git.egplusww.jp/api/packages/Composer/composer"
         }
     },
+    "require": {
+        "php": "^7.4 || ^8.0",
+        "ext-mbstring": "*"
+    },
     "require-dev": {
-        "egrajp/corelibs-composer-all": "^9.13"
+        "egrajp/corelibs-composer-all": "^9"
     }
 }