diff --git a/arbitrium-tx-latency-measurement/Dockerfile b/arbitrium-tx-latency-measurement/Dockerfile
index cdd30b1..f478e8d 100644
--- a/arbitrium-tx-latency-measurement/Dockerfile
+++ b/arbitrium-tx-latency-measurement/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:16
+FROM node:18
 
 WORKDIR /usr/src/klaytn
 
diff --git a/arbitrium-tx-latency-measurement/sendtx_arbitrium.js b/arbitrium-tx-latency-measurement/sendtx_arbitrium.js
index 9567888..3c790cf 100644
--- a/arbitrium-tx-latency-measurement/sendtx_arbitrium.js
+++ b/arbitrium-tx-latency-measurement/sendtx_arbitrium.js
@@ -239,8 +239,7 @@ async function sendTx() {
         data.txFee =
           Number(receipt.gasUsed) *
           Number(web3.utils.fromWei(Number(receipt.effectiveGasPrice), "ether"));
-      })
-      .catch(console.error);
+      });
 
     const db = await JSONPreset("db.json", { posts: [] });
     db.data.posts.push({
diff --git a/optimism-tx-latency-measurement/Dockerfile b/optimism-tx-latency-measurement/Dockerfile
index 347c187..5595fb0 100644
--- a/optimism-tx-latency-measurement/Dockerfile
+++ b/optimism-tx-latency-measurement/Dockerfile
@@ -1,4 +1,4 @@
-FROM node:16
+FROM node:18
 
 WORKDIR /usr/src/klaytn