diff --git a/.github/workflows/test.yml b/.github/workflows/test.yml
index 5f5230d..fa7ae39 100644
--- a/.github/workflows/test.yml
+++ b/.github/workflows/test.yml
@@ -5,7 +5,7 @@ jobs:
   build:
     strategy:
       matrix:
-        php: ['7.4']
+        php: ['8.0']
       fail-fast: false
     name: PHP ${{ matrix.php }}
     runs-on: ubuntu-latest
diff --git a/composer.json b/composer.json
index a8247ff..5b4db51 100644
--- a/composer.json
+++ b/composer.json
@@ -36,9 +36,12 @@
 		]
 	},
 	"require" : {
-		"twig/twig":"^1.2",
-		"twig/extensions":"^1.3",
-		"php":"^7.1|^8.0"
+		"php":"^8.0",
+		"twig/twig": "^3",
+		"twig/string-extra": "^3",
+		"twig/intl-extra": "^3",
+		"twig/html-extra": "^3",
+		"twig/markdown-extra": "^3"
 	},
 	"require-dev": {
 		"wp-coding-standards/wpcs": "^2.1",
diff --git a/lib/clarkson-core-templates.php b/lib/clarkson-core-templates.php
index fdb51f1..111f2fc 100644
--- a/lib/clarkson-core-templates.php
+++ b/lib/clarkson-core-templates.php
@@ -5,6 +5,12 @@
  * @package CLARKSON\Lib
  */
 
+use Twig\Extension\DebugExtension;
+use Twig\Extra\Html\HtmlExtension;
+use Twig\Extra\Intl\IntlExtension;
+use Twig\Extra\Markdown\MarkdownExtension;
+use Twig\Extra\String\StringExtension;
+
 /**
  * Allows rendering of specific templates with Twig.
  */
@@ -126,7 +132,7 @@ public function render_twig( $path, $objects, $ignore_warning = false ) {
 		return $twig->render( $template_file, $context_args );
 	}
 
-	private function get_twig_environment( array $template_dirs ):Twig_Environment {
+	private function get_twig_environment( array $template_dirs ):\Twig\Environment {
 		if ( ! $this->twig ) {
 			$debug     = ( defined( 'WP_DEBUG' ) ? constant( 'WP_DEBUG' ) : false );
 			$twig_args = array(
@@ -150,17 +156,17 @@ private function get_twig_environment( array $template_dirs ):Twig_Environment {
 			 * } );
 			 */
 			$twig_args = apply_filters( 'clarkson_twig_args', $twig_args );
-			$twig_fs   = new Twig_Loader_Filesystem( $template_dirs );
-			$twig      = new Twig_Environment( $twig_fs, $twig_args );
+			$twig_fs   = new \Twig\Loader\FilesystemLoader( $template_dirs );
+			$twig      = new \Twig\Environment( $twig_fs, $twig_args );
 
 			$twig->addExtension( new Clarkson_Core_Twig_Extension() );
-			$twig->addExtension( new Twig_Extensions_Extension_I18n() );
-			$twig->addExtension( new Twig_Extensions_Extension_Text() );
-			$twig->addExtension( new Twig_Extensions_Extension_Array() );
-			$twig->addExtension( new Twig_Extensions_Extension_Date() );
+			$twig->addExtension( new IntlExtension() );
+			$twig->addExtension( new StringExtension() );
+			$twig->addExtension( new HtmlExtension() );
+			$twig->addExtension( new MarkdownExtension() );
 
 			if ( $debug ) {
-				$twig->addExtension( new Twig_Extension_Debug() );
+				$twig->addExtension( new DebugExtension() );
 			}
 
 			/**
@@ -180,6 +186,7 @@ private function get_twig_environment( array $template_dirs ):Twig_Environment {
 			 */
 			$this->twig = apply_filters( 'clarkson_twig_environment', $twig );
 		}
+
 		return $this->twig;
 	}
 
diff --git a/lib/clarkson-core-twig-extension.php b/lib/clarkson-core-twig-extension.php
index d04aa2d..7496064 100644
--- a/lib/clarkson-core-twig-extension.php
+++ b/lib/clarkson-core-twig-extension.php
@@ -9,7 +9,7 @@
  * Class Clarkson_Core_Twig_Extension.
  * @internal
  */
-class Clarkson_Core_Twig_Extension extends Twig_Extension {
+class Clarkson_Core_Twig_Extension extends \Twig\Extension\AbstractExtension {
 
 	/**
 	 * Twig functions.
@@ -988,7 +988,7 @@ public function getFunctions() {
 		$allowed_functions = apply_filters( 'clarkson_twig_functions', $this->functions );
 
 		foreach ( $allowed_functions  as $function ) {
-			$twig_functions[] = new Twig_SimpleFunction( $function, $function );
+			$twig_functions[] = new \Twig\TwigFunction( $function, $function );
 		}
 
 		return $twig_functions;