diff --git a/readme.md b/readme.md
index 8c7d3ea..c9bfe94 100644
--- a/readme.md
+++ b/readme.md
@@ -7,4 +7,7 @@ This bot is based on [shrimpBot](https://github.com/numselli/shrimpBot). Convert
 
 Use the following command to initialize the database.
 `node dbinit.js`
-It will create the needed collection and document and return it in the console output.
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+It will create the needed collection and document and return it in the console output.
+
+Use the output of _id for the search and update operation. The following part is needed for this
+_id: new ObjectId(=="6448db015eed6ed191ef61a1"==),
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