diff --git a/PHPCtags.class.php b/PHPCtags.class.php
index fcffb55..fb59f73 100644
--- a/PHPCtags.class.php
+++ b/PHPCtags.class.php
@@ -132,6 +132,10 @@ private function struct($node, $reset=FALSE, $parent=array())
             foreach ($node as $subNode) {
                 $this->struct($subNode);
             }
+        } elseif ($node instanceof Stmt\Expression) {
+            foreach ($node as $subNode) {
+                $this->struct($subNode);
+            }
         } elseif ($node instanceof Stmt\Class_) {
             $kind = 'c';
             $name = $node->name;
diff --git a/composer.json b/composer.json
index 1df040c..80dcfbd 100644
--- a/composer.json
+++ b/composer.json
@@ -5,7 +5,7 @@
     "type": "library",
     "require": {
         "php": ">=5.3",
-        "nikic/php-parser": "^3.1"
+        "nikic/php-parser": "^4.0"
     },
     "require-dev": {
         "phpunit/phpunit": "~4"