diff --git a/phpBB/phpbb/template/twig/lexer.php b/phpBB/phpbb/template/twig/lexer.php
index 10346ac299..56ea1f8930 100644
--- a/phpBB/phpbb/template/twig/lexer.php
+++ b/phpBB/phpbb/template/twig/lexer.php
@@ -15,7 +15,7 @@ namespace phpbb\template\twig;
 
 class lexer extends \Twig_Lexer
 {
-	public function tokenize(\Twig_Source $source)
+	public function tokenize(\Twig\Source $source)
 	{
 		$code = $source->getCode();
 		$filename = $source->getName();
@@ -125,8 +125,8 @@ class lexer extends \Twig_Lexer
 		// Appends any filters
 		$code = preg_replace('#{([a-zA-Z0-9_\.]+)(\|[^}]+?)?}#', '{{ $1$2 }}', $code);
 
-		// Tokenize \Twig_Source instance
-		return parent::tokenize(new \Twig_Source($code, $filename));
+		// Tokenize \Twig\Source instance
+		return parent::tokenize(new \Twig\Source($code, $filename));
 	}
 
 	/**