diff --git a/src/commands/ExportAll.ts b/src/commands/ExportAll.ts
index d3cff8e..d8fa0ad 100644
--- a/src/commands/ExportAll.ts
+++ b/src/commands/ExportAll.ts
@@ -132,6 +132,11 @@ export class ExportAll {
               ? fileExtension
               : `.${fileExtension}`;
           }
+          if (fileExtension && item.type === "folder") {
+            fileSuffix = fileExtension.startsWith(`.`)
+              ? `/index${fileExtension}`
+              : `/index.${fileExtension}`;
+          }
 
           if (namedExports) {
             const filePath = join(uri.fsPath, item.name);