diff --git a/.env b/.env
new file mode 100644
index 0000000..81de221
--- /dev/null
+++ b/.env
@@ -0,0 +1 @@
+PRIVATE_KEY_PATH=./laiba-app.2024-05-08.private-key.pem
diff --git a/index.js b/index.js
index d930de3..091b8f1 100644
--- a/index.js
+++ b/index.js
@@ -1,17 +1,26 @@
-const jwt = require('jsonwebtoken')
-const fs = require('fs')
+require("dotenv").config();
 
-fs.readFile('./laiba-backend-app.2021-11-29.private-key.pem', 'utf-8', (err, data) => {
-    //iat
+const jwt = require("jsonwebtoken");
+const fs = require("fs").promises;
 
-    const date = Math.floor(new Date().getTime() / 1000)
+const PRIVATE_KEY_PATH = process.env.PRIVATE_KEY_PATH;
+
+const generateToken = async () => {
+  try {
+    const privateKey = await fs.readFile(PRIVATE_KEY_PATH, "utf-8");
+    const date = Math.floor(new Date().getTime() / 1000);
 
     const payload = {
-        iat: date - 60,
-        exp: date + (10 * 60),
-        iss: "APP_ID"
-    }
+      iat: date - 60,
+      exp: date + 10 * 60,
+      iss: "APP_ID",
+    };
+
+    const jwtToken = jwt.sign(payload, privateKey, { algorithm: "RS256" });
+    console.log(jwtToken);
+  } catch (error) {
+    console.error("Error reading file data", error);
+  }
+};
 
-    const jwt_token = jwt.sign(payload, data, { algorithm: 'RS256' })
-    console.log(jwt_token)
-})
\ No newline at end of file
+generateToken();
diff --git a/package-lock.json b/package-lock.json
index a4038dc..5a360f3 100644
--- a/package-lock.json
+++ b/package-lock.json
@@ -9,6 +9,7 @@
       "version": "1.0.0",
       "license": "ISC",
       "dependencies": {
+        "dotenv": "^16.4.5",
         "jsonwebtoken": "^8.5.1"
       }
     },
@@ -17,6 +18,17 @@
       "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
       "integrity": "sha1-+OcRMvf/5uAaXJaXpMbz5I1cyBk="
     },
+    "node_modules/dotenv": {
+      "version": "16.4.5",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.4.5.tgz",
+      "integrity": "sha512-ZmdL2rui+eB2YwhsWzjInR8LldtZHGDoQ1ugH85ppHKwpUHL7j7rN0Ti9NCnGiQbhaZ11FpR+7ao1dNsmduNUg==",
+      "engines": {
+        "node": ">=12"
+      },
+      "funding": {
+        "url": "https://dotenvx.com"
+      }
+    },
     "node_modules/ecdsa-sig-formatter": {
       "version": "1.0.11",
       "resolved": "https://registry.npmjs.org/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz",
@@ -139,6 +151,11 @@
       "resolved": "https://registry.npmjs.org/buffer-equal-constant-time/-/buffer-equal-constant-time-1.0.1.tgz",
       "integrity": "sha1-+OcRMvf/5uAaXJaXpMbz5I1cyBk="
     },
+    "dotenv": {
+      "version": "16.4.5",
+      "resolved": "https://registry.npmjs.org/dotenv/-/dotenv-16.4.5.tgz",
+      "integrity": "sha512-ZmdL2rui+eB2YwhsWzjInR8LldtZHGDoQ1ugH85ppHKwpUHL7j7rN0Ti9NCnGiQbhaZ11FpR+7ao1dNsmduNUg=="
+    },
     "ecdsa-sig-formatter": {
       "version": "1.0.11",
       "resolved": "https://registry.npmjs.org/ecdsa-sig-formatter/-/ecdsa-sig-formatter-1.0.11.tgz",
diff --git a/package.json b/package.json
index 63f5032..a53a51c 100644
--- a/package.json
+++ b/package.json
@@ -10,6 +10,7 @@
   "author": "",
   "license": "ISC",
   "dependencies": {
+    "dotenv": "^16.4.5",
     "jsonwebtoken": "^8.5.1"
   }
 }