diff --git a/README.md b/README.md
index 72da389..a18af15 100644
--- a/README.md
+++ b/README.md
@@ -87,6 +87,7 @@ Consider this json :
 ```
 
 It returns an array, you can so use default [functions](http://php.net/manual/fr/ref.array.php) on the result (Have unique key for example)
+From 1.1.0, it returns an empty array if the node does not exists
 
 - You can change a value like this :
 
@@ -111,6 +112,7 @@ It returns an array, you can so use default [functions](http://php.net/manual/fr
 ```
 
 The value is passed by reference, so, when you are using a set, your object "$o" is modified.
+It returns a boolean to know if the node has been modified or not
 
 - You can add a value like this :
 
@@ -135,6 +137,7 @@ The value is passed by reference, so, when you are using a set, your object "$o"
 ```
 
 The parameter "key" is optional, a number will be set if you're not providing one.
+It returns a boolean to know if the node has been modified or not
 
 - You can remove an attribute like this :