diff --git a/syntaxhighlighter.php b/syntaxhighlighter.php
index 2b2c057..f3f1085 100644
--- a/syntaxhighlighter.php
+++ b/syntaxhighlighter.php
@@ -554,7 +554,7 @@ public function render_block( $attributes, $content ) {
 			}
 		}
 
-		$code = preg_replace( '#<pre [^>]+>([^<]+)?</pre>#', '$1', $content );
+		$code = preg_replace( '#<pre [^>]+>(.*)</pre>#s', '$1', $content );
 
 		// Undo escaping done by WordPress
 		$code = htmlspecialchars_decode( $code );