diff --git a/composer.json b/composer.json
index bbf457b..ee2d54a 100644
--- a/composer.json
+++ b/composer.json
@@ -14,10 +14,12 @@
         }
     ],
     "require": {
-        "php": ">=7.1"
+        "php": ">=7.1",
+        "brick/phonenumber": "^0.6.0",
+        "ext-intl": "*"
     },
     "require-dev": {
-        "phpunit/phpunit": "^6.5",
+        "phpunit/phpunit": "^10.5",
         "squizlabs/php_codesniffer": "^3.2",
         "mikey179/vfsstream": "^1.6"
     },
diff --git a/src/Formatter/Property/TelephoneFormatter.php b/src/Formatter/Property/TelephoneFormatter.php
index ff5700f..8c9752e 100644
--- a/src/Formatter/Property/TelephoneFormatter.php
+++ b/src/Formatter/Property/TelephoneFormatter.php
@@ -20,6 +20,6 @@ public function getVcfString(): string
     {
         return $this->telephone->getNode() .
           ';TYPE=' . $this->telephone->getType()->__toString() .
-          ';VALUE=' . $this->telephone->getValue() . ':tel:' . $this->telephone->getTelephoneNumber();
+          ';VALUE=' . $this->telephone->getValue() . ':' . $this->telephone->getTelephoneNumberURI();
     }
 }
diff --git a/src/Property/Telephone.php b/src/Property/Telephone.php
index 379df23..8b78c51 100644
--- a/src/Property/Telephone.php
+++ b/src/Property/Telephone.php
@@ -4,6 +4,8 @@
 
 namespace JeroenDesloovere\VCard\Property;
 
+use Brick\PhoneNumber\PhoneNumber;
+use Brick\PhoneNumber\PhoneNumberFormat;
 use JeroenDesloovere\VCard\Formatter\Property\NodeFormatterInterface;
 use JeroenDesloovere\VCard\Formatter\Property\TelephoneFormatter;
 use JeroenDesloovere\VCard\Parser\Property\NodeParserInterface;
@@ -16,6 +18,9 @@ final class Telephone implements PropertyInterface, NodeInterface
     /** @var string */
     protected $telephoneNumber;
 
+    /** @var PhoneNumber */
+    protected $phoneNumber;
+
     /** @var Type */
     private $type;
 
@@ -24,7 +29,10 @@ final class Telephone implements PropertyInterface, NodeInterface
 
     public function __construct(string $telephoneNumber, Type $type = null, Value $value = null)
     {
-        $this->telephoneNumber = str_replace(' ', '-', $telephoneNumber);
+        $regionCode = \Locale::getRegion(\Locale::getDefault());
+        $this->phoneNumber = PhoneNumber::parse($telephoneNumber, $regionCode);
+        $this->telephoneNumber = $this->phoneNumber->format(PhoneNumberFormat::NATIONAL);
+
         $this->type = $type ?? Type::home();
         $this->value = $value ?? Value::uri();
     }
@@ -49,6 +57,16 @@ public function getTelephoneNumber(): string
         return $this->telephoneNumber;
     }
 
+    public function getTelephoneNumberURI(): string
+    {
+        return $this->phoneNumber->format(PhoneNumberFormat::RFC3966);
+    }
+
+    public function getPhoneNumber(): PhoneNumber
+    {
+        return $this->phoneNumber;
+    }
+
     public static function getParser(): NodeParserInterface
     {
         return new TelephoneParser();