diff --git a/Dockerfile b/Dockerfile
index 86f4498..ba335e7 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:12
+FROM node:14
 WORKDIR /app
 
 COPY package.json yarn.lock ./
diff --git a/docker-compose.yml b/docker-compose.yml
index e66eed7..7c1864f 100644
--- a/docker-compose.yml
+++ b/docker-compose.yml
@@ -1,4 +1,4 @@
-version: '2'
+version: '3'
 
 services:
   server:
diff --git a/example.env b/example.env
index 9fedc56..79c001a 100644
--- a/example.env
+++ b/example.env
@@ -5,15 +5,22 @@ LETSENCRYPT_HOST=
 # server settings
 PORT=8000
 
-# commission for service
-# transfer fee is a fixed value in ether, 0.01 means 0.01 ether
-TRANSFER_SERVICE_FEE=0.01
-# withdrawal fee is a percentage of the amount, 0.05 means 0.05%
-WITHDRAWAL_SERVICE_FEE=0.05
+CHAIN_ID=100
+SERVICE_FEE=0.05
+
+NODE_ENV=production
+
+REDIS_URL=redis://127.0.0.1:6379
+
 REWARD_ADDRESS=
 
-# tx-manager settings
-CHAIN_ID=1
 PRIVATE_KEY=
 CONFIRMATIONS=4
 MAX_GAS_PRICE=100
+
+# commission for service
+# transfer fee is a fixed value in ether, 0.01 means 0.01 ether
+TRANSFER_SERVICE_FEE=0.000000001
+# withdrawal fee is a percentage of the amount, 0.05 means 0.05%
+WITHDRAWAL_SERVICE_FEE=0.01
+
diff --git a/src/constants/contracts.ts b/src/constants/contracts.ts
index c2a1aff..9cdf6ba 100644
--- a/src/constants/contracts.ts
+++ b/src/constants/contracts.ts
@@ -4,7 +4,7 @@ export const CONTRACT_NETWORKS: { [chainId in ChainId]: string } = {
   // [ChainId.MAINNET]: '0x8Bfac9EF3d73cE08C7CEC339C0fE3B2e57814c1E',
   [ChainId.GOERLI]: '0xE2D9aF526edeB16a02FBC3B68B0eB9B534f9c114',
   [ChainId.OPTIMISM]: '0xcd7318c299A82E887f5180EF865a4c350dFC9fe5',
-  [ChainId.XDAI]: '0x4d701A6EE8c13D3AB0d2CE4dfA773c04fa4C5933',
+  [ChainId.XDAI]: '0xdd85b1dbE3379AFA37F703822f9E328d4bAf8625',
 };
 
 export const RPC_LIST: { [chainId in ChainId]: string } = {