diff --git a/gcal-import-worker.php b/gcal-import-worker.php
index 95b75e3..f902f19 100644
--- a/gcal-import-worker.php
+++ b/gcal-import-worker.php
@@ -40,7 +40,7 @@ function gcal_import_worker()
 
     global $wpdb;
     $table = $wpdb->prefix.GCAL_TABLE;
-    $categories = $wpdb->query("SELECT gcal_category from $table");
+    $categories = $wpdb->get_results("SELECT gcal_category from $table");
     $file = dirname (__FILE__) . '/categories.txt'; 
     file_put_contents ($file, var_dump ($categories)); 
 /*