diff --git a/base.py b/base.py
index 6ae9137..a2d58f2 100644
--- a/base.py
+++ b/base.py
@@ -166,9 +166,13 @@ class Extension:
     @classmethod
     def get_rpcmethod(cls, method):
         for extension in cls.extensions:
-            is_exported_method = (method == extension.method) or (
-                method in extension.exported_methods
-            )
+            is_exported_method = False
+            try:
+                is_exported_method = (method == extension.method) or (
+                    method in extension.exported_methods
+                )
+            except:
+                pass
             if extension.type == "rpcmethod" and is_exported_method:
                 return extension
         return None
diff --git a/console.html b/console.html
index e252db3..549b15b 100644
--- a/console.html
+++ b/console.html
@@ -296,7 +296,7 @@
                         if (env.method == "analyze_sequence") {
                             var _this = this;
                             this.read("Enter the sequence:\r\n", function(message) {
-                                jsonrpc2_request(this, env.method, {
+                                jsonrpc2_request(_this, env.method, {
                                     "sequence": message
                                 });
                             });
@@ -307,7 +307,7 @@
                         if (env.method == "gc_content_calculation") {
                             var _this = this;
                             this.read("Enter the sequence:\r\n", function(message) {
-                                jsonrpc2_request(this, env.method, {
+                                jsonrpc2_request(_this, env.method, {
                                     "sequence": message
                                 });
                             });
diff --git a/requirements.txt b/requirements.txt
index cfb6c59..37a380b 100644
--- a/requirements.txt
+++ b/requirements.txt
@@ -2,3 +2,5 @@ python-decouple
 requests
 aiosmtpd
 ruff
+flask
+flask_cors
\ No newline at end of file
diff --git a/web.py b/web.py
index 8b0f752..3067be4 100644
--- a/web.py
+++ b/web.py
@@ -7,18 +7,20 @@
 # Namyheon Go (Catswords Research) <gnh1201@gmail.com>
 # https://github.com/gnh1201/caterpillar
 # Created at: 2024-05-20
-# Updated at: 2024-07-10
+# Updated at: 2024-10-25
 #
 
 import os
 import sys
 from decouple import config
 from flask import Flask, request, render_template
+from flask_cors import CORS
 from base import Extension, jsonrpc2_error_encode, Logger
 
 # TODO: 나중에 Flask 커스텀 핸들러 구현 해야 함
 logger = Logger(name="web")
 app = Flask(__name__)
+CORS(app)
 app.config["UPLOAD_FOLDER"] = "data/"
 if not os.path.exists(app.config["UPLOAD_FOLDER"]):
     os.makedirs(app.config["UPLOAD_FOLDER"])
@@ -51,9 +53,16 @@ def process_jsonrpc2():
     # JSON-RPC 2.0 request
     json_data = request.get_json(silent=True)
     if json_data["jsonrpc"] == "2.0":
-        return Extension.dispatch_rpcmethod(
-            json_data["method"], "call", json_data["id"], json_data["params"], conn
-        )
+        result = Extension.dispatch_rpcmethod(
+            json_data["method"], "call", json_data["id"], json_data["params"], conn)
+
+        return {
+            "jsonrpc": "2.0",
+            "result": {
+                "data": result
+            },
+            "id": None
+        }
 
     # when error
     return jsonrpc2_error_encode({"message": "Not valid JSON-RPC 2.0 request"})