diff --git a/shard.yml b/shard.yml
index 43fbac1..124b49b 100644
--- a/shard.yml
+++ b/shard.yml
@@ -1,8 +1,9 @@
 name: dodb
-version: 0.2.1
+version: 0.2.2
 
 authors:
   - Luka Vandervelden <lukc@upyum.com>
+  - Philippe Pittoli <karchnu@karchnu.fr>
 
 description: |
   Simple, embeddable Document-Oriented DataBase in Crystal.
diff --git a/src/dodb/index.cr b/src/dodb/index.cr
index 5e5bb9e..962d69b 100644
--- a/src/dodb/index.cr
+++ b/src/dodb/index.cr
@@ -87,6 +87,12 @@ class DODB::Index(V) < DODB::Indexer(V)
 		{value, key}
 	end
 
+	# in case new_value hasn't change its index
+	def update(new_value : V)
+		index = key_proc.call new_value
+		update index, new_value
+	end
+
 	def update(index : String, new_value : V)
 		_, key = get_with_key index