diff --git a/dist/commands/aave.js b/dist/commands/aave.js
index e956966..52af6c2 100644
--- a/dist/commands/aave.js
+++ b/dist/commands/aave.js
@@ -5,14 +5,15 @@ const viem_1 = require("viem");
 const commander_1 = require("commander");
 const protocol_1 = require("../types/protocol");
 const aave_1 = require("../utils/aave");
+const cron_1 = require("../libs/cron");
 exports.aave = new commander_1.Command("aave");
 exports.aave
     .description("Start the aave protocol")
     .option("-p, --pk <private key>", "private key of signer")
     .option("    --amount <amount>", "amount of ETH")
     .option("-d, --delay <delay time>", "delay in minutes")
+    .option("-c, --cronjob <cron job...>", 'cron job expression i.e. "*/5 * * * *"')
     .action((options) => {
-    const cronTab = process.env.CRONJOB || "* * * * * *";
-    const aaveProtocol = new protocol_1.Protocol(aave_1.aave, options.pk, (0, viem_1.parseEther)(options.amount), cronTab, Number(options.delay));
+    const aaveProtocol = new protocol_1.Protocol(aave_1.aave, options.pk, (0, viem_1.parseEther)(options.amount), (0, cron_1.parseCronJob)(options.cronjob), Number(options.delay));
     aaveProtocol.execute();
 });
diff --git a/dist/commands/uniswap.js b/dist/commands/uniswap.js
index 4eccfd7..0c7ade6 100644
--- a/dist/commands/uniswap.js
+++ b/dist/commands/uniswap.js
@@ -5,14 +5,15 @@ const viem_1 = require("viem");
 const commander_1 = require("commander");
 const protocol_1 = require("../types/protocol");
 const uniswap_1 = require("../utils/uniswap");
+const cron_1 = require("../libs/cron");
 exports.uniswap = new commander_1.Command("uniswap");
 exports.uniswap
     .description("Start the uniswap protocol")
     .option("-p, --pk <private key>", "private key of signer")
     .option("    --amount <amount>", "amount of ETH")
     .option("-d, --delay <delay time>", "delay in minutes")
+    .option("-c, --cronjob <cron job...>", 'cron job expression (every five seconds i.e. "*/5 * * * *")')
     .action((options) => {
-    const cronTab = process.env.CRONJOB || "* * * * * *";
-    const uniswapProtocol = new protocol_1.Protocol(uniswap_1.uniswap, options.pk, (0, viem_1.parseEther)(options.amount), cronTab, Number(options.delay));
+    const uniswapProtocol = new protocol_1.Protocol(uniswap_1.uniswap, options.pk, (0, viem_1.parseEther)(options.amount), (0, cron_1.parseCronJob)(options.cronjob), Number(options.delay));
     uniswapProtocol.execute();
 });
diff --git a/dist/libs/cron.js b/dist/libs/cron.js
index 221a124..7238d9c 100644
--- a/dist/libs/cron.js
+++ b/dist/libs/cron.js
@@ -9,7 +9,7 @@ var __awaiter = (this && this.__awaiter) || function (thisArg, _arguments, P, ge
     });
 };
 Object.defineProperty(exports, "__esModule", { value: true });
-exports.createConfig = void 0;
+exports.parseCronJob = exports.createConfig = void 0;
 const time_1 = require("./time");
 function createConfig(interaction, cronTime, delay) {
     return {
@@ -28,3 +28,13 @@ function createConfig(interaction, cronTime, delay) {
     };
 }
 exports.createConfig = createConfig;
+function parseCronJob(cronJob) {
+    const parseResult = cronJob.map((job) => {
+        if (job.includes('"')) {
+            return job.replace('"', "");
+        }
+        return job;
+    });
+    return parseResult.join(" ");
+}
+exports.parseCronJob = parseCronJob;
diff --git a/dist/libs/time.js b/dist/libs/time.js
index 85839bd..3045138 100644
--- a/dist/libs/time.js
+++ b/dist/libs/time.js
@@ -18,10 +18,10 @@ function getTime() {
     return formatStakeTime;
 }
 exports.getTime = getTime;
-function randomDelay() {
-    return __awaiter(this, arguments, void 0, function* (delay_ = 0) {
+function randomDelay(limit) {
+    return __awaiter(this, void 0, void 0, function* () {
         const MINUTES = 60; // 60 seconds
-        const LIMIT = Number(delay_) * MINUTES; // 最多不超過延遲 $DELAY 分鐘
+        const LIMIT = Number(limit) * MINUTES; // 最多不超過延遲 $DELAY 分鐘
         const rand = Math.floor(Math.random() * LIMIT);
         console.log(`Start time: ${getTime()} | Delay ${rand} seconds`);
         yield delay(rand * 1000);
@@ -36,3 +36,4 @@ function delay(ms) {
     });
 }
 exports.delay = delay;
+// -c "*/5 * * * * *" -d 0 -p $PK --amount 0.01
diff --git a/src/commands/aave.ts b/src/commands/aave.ts
index 960db1e..e932fe4 100644
--- a/src/commands/aave.ts
+++ b/src/commands/aave.ts
@@ -3,6 +3,7 @@ import { Command } from "commander";
 
 import { Protocol } from "../types/protocol";
 import { aave as aaveFn } from "../utils/aave";
+import { parseCronJob } from "../libs/cron";
 
 export const aave = new Command("aave");
 
@@ -11,14 +12,16 @@ aave
   .option("-p, --pk <private key>", "private key of signer")
   .option("    --amount <amount>", "amount of ETH")
   .option("-d, --delay <delay time>", "delay in minutes")
+  .option(
+    "-c, --cronjob <cron job...>",
+    'cron job expression i.e. "*/5 * * * *"'
+  )
   .action((options) => {
-    const cronTab = process.env.CRONJOB || "* * * * * *";
-
     const aaveProtocol = new Protocol(
       aaveFn,
       options.pk,
       parseEther(options.amount),
-      cronTab,
+      parseCronJob(options.cronjob),
       Number(options.delay)
     );
 
diff --git a/src/commands/uniswap.ts b/src/commands/uniswap.ts
index fbb314d..edb7b37 100644
--- a/src/commands/uniswap.ts
+++ b/src/commands/uniswap.ts
@@ -3,6 +3,7 @@ import { Command } from "commander";
 
 import { Protocol } from "../types/protocol";
 import { uniswap as uniswapFn } from "../utils/uniswap";
+import { parseCronJob } from "../libs/cron";
 
 export const uniswap = new Command("uniswap");
 
@@ -11,14 +12,16 @@ uniswap
   .option("-p, --pk <private key>", "private key of signer")
   .option("    --amount <amount>", "amount of ETH")
   .option("-d, --delay <delay time>", "delay in minutes")
+  .option(
+    "-c, --cronjob <cron job...>",
+    'cron job expression (every five seconds i.e. "*/5 * * * *")'
+  )
   .action((options) => {
-    const cronTab = process.env.CRONJOB || "* * * * * *";
-
     const uniswapProtocol = new Protocol(
       uniswapFn,
       options.pk,
       parseEther(options.amount),
-      cronTab,
+      parseCronJob(options.cronjob),
       Number(options.delay)
     );
 
diff --git a/src/libs/cron.ts b/src/libs/cron.ts
index 9f844d0..aa0ff2a 100644
--- a/src/libs/cron.ts
+++ b/src/libs/cron.ts
@@ -20,3 +20,14 @@ export function createConfig(
     timeZone: "Asia/Taipei",
   };
 }
+
+export function parseCronJob(cronJob: string[]) {
+  const parseResult = cronJob.map((job) => {
+    if (job.includes('"')) {
+      return job.replace('"', "");
+    }
+    return job;
+  });
+
+  return parseResult.join(" ");
+}
diff --git a/src/libs/time.ts b/src/libs/time.ts
index e047722..752fa54 100644
--- a/src/libs/time.ts
+++ b/src/libs/time.ts
@@ -7,9 +7,9 @@ export function getTime() {
   return formatStakeTime;
 }
 
-export async function randomDelay(delay_: number = 0) {
+export async function randomDelay(limit: number) {
   const MINUTES = 60; // 60 seconds
-  const LIMIT = Number(delay_) * MINUTES; // 最多不超過延遲 $DELAY 分鐘
+  const LIMIT = Number(limit) * MINUTES; // 最多不超過延遲 $DELAY 分鐘
 
   const rand = Math.floor(Math.random() * LIMIT);
   console.log(`Start time: ${getTime()} | Delay ${rand} seconds`);
@@ -21,3 +21,5 @@ export async function delay(ms: number) {
     setTimeout(resolve, ms);
   });
 }
+
+// -c "*/5 * * * * *" -d 0 -p $PK --amount 0.01