diff --git a/README.md b/README.md
index 0fac46c..0a4fa0e 100644
--- a/README.md
+++ b/README.md
@@ -93,7 +93,10 @@ docker exec -it $(docker-compose ps | grep postgres | awk '{print $1}') psql -v
 ## 27.10.2021
  - Change javascript instance of IPFS to separate service, which runs [go-IPFS](https://github.com/ipfs/go-ipfs) daemon.
  - Move orbitdb mounting directory on the host to the top level at `./data/orbitdb`.
-
+ - Added ARBITRUM testnet to [config/chains_config.json](https://github.com/debridge-finance/debridge-launcher/tree/master/config)
+ - Added Sentry. If you are using sentry, please update SENTRY_DSN at .env file.
+ - Removed DEBRIDGE_API_ACCESS_KEY. We support validators auth by singing message with private key
+ 
 ### How to migrate
 ```shell
 # stop running containers 
@@ -122,4 +125,4 @@ docker-compose restart
 
 # check if any errors occured
 docker-compose logs -f | grep -i "error"
-```
\ No newline at end of file
+```