diff --git a/README.md b/README.md
index 5ef6165..ac578a8 100644
--- a/README.md
+++ b/README.md
@@ -17,7 +17,7 @@ Add ethereum url, account's address and account's password to config file *(path
 
 ## Specify plugin configuration
 In [plugin configuration](#Plugin.config) there are already [playground](https://playground.devicehive.com) urls, however you can run [devicehive](https://github.com/devicehive/devicehive-docker) locally and write your own.
-Add plugin topic and access token. Also add user and password for [devicehive admin panel](https://github.com/devicehive/devicehive-admin-panel).
+Add plugin topic and access token. Also add user access token, which you can copy from playground.
 
 # Simple start
 
@@ -38,6 +38,7 @@ Logger will notify you about results. You will see message `Transaction has been
 
 You can find plugin configuration in `./config.json`
 Plugin part of configuration you can find [here](https://github.com/devicehive/devicehive-plugin-core-node#configuration).
+Also plugin authentication process and options are described [here](https://github.com/devicehive/devicehive-plugin-core-node/blob/master/README.md#plugin-authentication).
 
 **_PLUGIN_PROPS_** - plugin's properties. There are only filters at the moment.
 **_PLUGIN_PROPS.OVERRIDE_** - set it to true and plugin's filters will be updated according to config.
@@ -62,7 +63,7 @@ Examples:
 
 ## Ethereum smart contract
 
-You can find configuration in `./src/ethereum-node/config.json`
+You can find configuration in `./ethereum-config.json`
 
 * **_CONTRACT_PATH_** - path to your smart contract, <br />
 * **_ETHEREUM_URL_** - url to ethereum node, <br />
diff --git a/src/ethereum-node/config.json b/ethereum-config.json
similarity index 100%
rename from src/ethereum-node/config.json
rename to ethereum-config.json
diff --git a/index.js b/index.js
index 455b638..59b232f 100644
--- a/index.js
+++ b/index.js
@@ -2,7 +2,7 @@ const { DeviceHivePlugin } = require(`devicehive-plugin-core`);
 
 const log = require('./src/utils/Logger');
 const pluginConfig = require('./config/index');
-const ethereumConfig = require('./src/ethereum-node/config.json');
+const ethereumConfig = require('./ethereum-config.json');
 const EthereumAccount = require('./src/ethereum-node/EthereumAccount');
 const PluginContract = require('./src/ethereum-node/PluginContract');
 const PluginEthereumService = require('./src/PluginEthereumService');
diff --git a/src/ethereum-node/GasLimiter.js b/src/ethereum-node/GasLimiter.js
index 351600a..6d198ef 100644
--- a/src/ethereum-node/GasLimiter.js
+++ b/src/ethereum-node/GasLimiter.js
@@ -1,4 +1,4 @@
-const ethereumConfig = require ('./config.json');
+const ethereumConfig = require ('../../ethereum-config.json');
 
 class GasLimiter {
     constructor(gasLimit, timePeriod) {
diff --git a/src/utils/PluginEthereumUtils.js b/src/utils/PluginEthereumUtils.js
index d9572b1..df3d5e2 100644
--- a/src/utils/PluginEthereumUtils.js
+++ b/src/utils/PluginEthereumUtils.js
@@ -1,4 +1,4 @@
-const config = require('../ethereum-node/config.json');
+const config = require('../../ethereum-config.json');
 const Utils = require('./Utils');
 
 class PluginEthereumUtils {