diff --git a/README.md b/README.md
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+++ b/README.md
@@ -4,8 +4,9 @@
 [![Build Status](https://travis-ci.org/keboola/serverless-papertrail-logging.svg?branch=master)](https://travis-ci.org/keboola/serverless-papertrail-logging)
 [![Maintainability](https://api.codeclimate.com/v1/badges/af9d714e852ca05d842b/maintainability)](https://codeclimate.com/github/keboola/serverless-papertrail-logging/maintainability)
 
-Serverless plugin for log delivery from CloudWatch Logs to Papertrail using a lambda function with log groups subscription
+Serverless plugin for log delivery from CloudWatch Logs to Papertrail using a lambda function with log groups subscription.
 
+The plugin ignores implicit Lambda logs (starting with `START`, `END` and `REPORT`) and adds Lambda request id to each event. Notice that it expects the logs to be in json format (and converts them to json if they are not).
 
 ### Installation