diff --git a/composer.json b/composer.json
index 4a8abe3..04c1abc 100644
--- a/composer.json
+++ b/composer.json
@@ -23,7 +23,7 @@
   "require": {
     "php": "^7.1 || ^8.0",
     "ext-mbstring": "*",
-    "sabberworm/php-css-parser": "^8.4"
+    "sabberworm/php-css-parser": "^8.4 || ^9.0"
   },
   "require-dev": {
     "phpunit/phpunit": "^7.5 || ^8 || ^9 || ^10 || ^11"
diff --git a/src/Svg/Style.php b/src/Svg/Style.php
index c5f3e08..3717d09 100644
--- a/src/Svg/Style.php
+++ b/src/Svg/Style.php
@@ -127,7 +127,7 @@ public function fromStyleSheets(AbstractTag $tag, $attributes) {
                             if ($_selector === ".$_class") {
                                 /** @var \Sabberworm\CSS\Rule\Rule $_rule */
                                 foreach ($_decl->getRules() as $_rule) {
-                                    $styles[$_rule->getRule()] = $_rule->getValue() . "";
+                                    $styles[$_rule->getRule()] = $_rule->getValue()->render() . "";
                                 }
 
                                 break 2;
@@ -139,7 +139,7 @@ public function fromStyleSheets(AbstractTag $tag, $attributes) {
                     if ($_selector === $tag->tagName) {
                         /** @var \Sabberworm\CSS\Rule\Rule $_rule */
                         foreach ($_decl->getRules() as $_rule) {
-                            $styles[$_rule->getRule()] = $_rule->getValue() . "";
+                            $styles[$_rule->getRule()] = $_rule->getValue()->render() . "";
                         }
 
                         break;