diff --git a/.example.env b/.example.env
index 9529ae5..e51a0ff 100644
--- a/.example.env
+++ b/.example.env
@@ -16,6 +16,6 @@ PARENTNET_ZERO_CONTRACT=0x0000000
 
 PARENTCHAIN_WALLET_PK=0x123
 
-ZERO_WALLET_PK=0x123
+PARENTNET_ZERO_WALLET_PK=0x123
 
 SLACK_WEBHOOK=https://hooks.slack.com/services/blablabla
diff --git a/src/server.ts b/src/server.ts
index 014e900..d69c6de 100644
--- a/src/server.ts
+++ b/src/server.ts
@@ -28,7 +28,7 @@ app.listen(config.port, async () => {
 });
 
 app.listen(config.port + 1, async () => {
-  if (!process.env.ZERO_WALLET_PK) {
+  if (!process.env.PARENTNET_ZERO_WALLET_PK) {
     logger.error("zero pk not found ,will dont running zero relayer");
     return;
   }
diff --git a/src/service/zero/index.ts b/src/service/zero/index.ts
index 652f374..c75d85a 100644
--- a/src/service/zero/index.ts
+++ b/src/service/zero/index.ts
@@ -12,8 +12,8 @@ import { sleep } from "../../utils";
 import Web3 from "web3";
 
 let account: PrivateKeyAccount = null;
-if (process.env.ZERO_WALLET_PK) {
-  account = privateKeyToAccount(`0x${process.env.ZERO_WALLET_PK}`);
+if (process.env.PARENTNET_ZERO_WALLET_PK) {
+  account = privateKeyToAccount(`0x${process.env.PARENTNET_ZERO_WALLET_PK}`);
 }
 
 const csc = process.env.CHECKPOINT_CONTRACT;