diff --git a/strange_eons_to_arkhamdb.js b/strange_eons_to_arkhamdb.js
index ad6f454..eb99bb2 100644
--- a/strange_eons_to_arkhamdb.js
+++ b/strange_eons_to_arkhamdb.js
@@ -261,7 +261,7 @@ for (let member in recurseAllChildren(Eons.getOpenProject())) {
         cards.push(card_data);
 
         let export_dir = new File(member.parent.file, 'export');
-        let target_file = new File(export_dir, card_data.code + '.png');
+        let target_file = new File(export_dir, card_data.code + '.' + FORMAT);
         if (!target_file.exists() || member.file.lastModified() > target_file.lastModified()) {
           printf("Image for '%s' is out of date, rebuilding...\n", member);
           export_dir.mkdir();