diff --git a/CHANGELOG.md b/CHANGELOG.md
index cf00f1c1..0bf3d737 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,3 +1,7 @@
+# Release 2.3.5(2024-03-03)
+## 🐞 Bug Fixes
+* Fix index Less function panic.
+
 # Release 2.3.4(2024-01-07)
 
 ## 🎄 Enhancements
diff --git a/index/btree.go b/index/btree.go
index ed117672..6120ffaa 100644
--- a/index/btree.go
+++ b/index/btree.go
@@ -28,6 +28,9 @@ func newBTree() *MemoryBTree {
 }
 
 func (it *item) Less(bi btree.Item) bool {
+	if bi == nil {
+		return false
+	}
 	return bytes.Compare(it.key, bi.(*item).key) < 0
 }