diff --git a/README.md b/README.md
index 0868dd5a..a355f34f 100644
--- a/README.md
+++ b/README.md
@@ -26,7 +26,7 @@ wsctl node log
 ### step 6 
 open a new terminal and execute
 ```bash
-wsctl message send -p "test01" -v "0.1" -d "{\"private_input\":\"14\", \"public_input\":\"3,34\", \"receipt_type\":\"Snark\"}"
+wsctl message send -p "test01" -v "0.1" -d "{\"private_input\":\"14\", \"public_input\":\"3,34\", \"receipt_type\":\"Stark\"}"
 ```
 will see log on `wsctl node log` terminal
 
diff --git a/docker-compose.yaml b/docker-compose.yaml
index 4701617c..34cac8ee 100644
--- a/docker-compose.yaml
+++ b/docker-compose.yaml
@@ -20,7 +20,7 @@ services:
       - .:/data
 
   risc0:
-    image: iotexdev/risc0server:v0.8rc1
+    image: iotexdev/risc0server:v0.8.stark
     depends_on:
       - "postgres"
     container_name: risc0-service
diff --git a/output/chain/eth/tx.go b/output/chain/eth/tx.go
index e9135a3a..fe652c2b 100644
--- a/output/chain/eth/tx.go
+++ b/output/chain/eth/tx.go
@@ -39,7 +39,7 @@ func SendTX(ctx context.Context, endpoint, privateKey, toStr string, data []byte
 		&types.LegacyTx{
 			Nonce:    nonce,
 			GasPrice: gasPrice,
-			Gas:      uint64(3000000), // TODO get gas limit by cli.EstimateGas
+			Gas:      uint64(3000000000), // TODO get gas limit by cli.EstimateGas
 			To:       &to,
 			Data:     data,
 		})