diff --git a/index.rst b/index.rst
index 381d2e8..885c75d 100644
--- a/index.rst
+++ b/index.rst
@@ -54,10 +54,10 @@
 
 .. only:: html
 
-	.. toctree::
-		:caption: 附錄
+    .. toctree::
+        :caption: 附錄
 		
-		apx-01-copy
+        apx-01-copy
 ..		apx-02-ab-testing
 	
     索引