diff --git a/update.md b/update.md
index d3c7db7..4ddbe29 100644
--- a/update.md
+++ b/update.md
@@ -24,4 +24,6 @@ Wrote Guides and Wikis and filled update logs.
 #### Indev-1.1
 Fixed the bug of `disjoint_set_union` about resizing.
 
-Added `sparse_table`(Not Tested, Wikis and guides will update after testing).
\ No newline at end of file
+Added `sparse_table`(Not Tested, Wikis and guides will update after testing).
+#### Indev-1.2
+Fixed some bugs of `sparse_table`. It can pass the test now.