# Changes in the node configuration file¶

This section provides information to help you identify changes in the configuration file depending on the node version.

Warning

If you are updating a node version, you must also update the node configuration file. The node will not run without updating the configuration file!

## Changes in the node configuration file of the 1.2.2 version¶

blockchain section

The Mainnet blockchain section needs to be changed instead of full settings to this one:

blockchain.type = MAINNET


Warning

If the node, which is connected to the Mainnet, has old blockchain section settings, it will fork!

The blockchain section corresponds to individual settings in all other cases.

## Changes in the node configuration file of the 1.2.0 version¶

docker-engine section

In the section docker-engine added parameter grpc-server, responsible for setting up gRPC server to work docker contracts with gRPC API:

grpc-server {
# gRPC server port
port = 6865
# Optional node host
# host = “192.168.65.2”
}


## Changes in the node configuration file for earlier versions¶

Node version 1.1.2

Node version 1.1.0