diff --git a/client/src/apis/auth.api.js b/client/src/apis/auth.api.js
index 3cdff35fc1697740d41a61e71f65c23e96b92e0d..b249b045e22ebb2260623705de8e7fe90514cb54 100644
--- a/client/src/apis/auth.api.js
+++ b/client/src/apis/auth.api.js
@@ -1,5 +1,5 @@
 import axios from "axios";
-import baseUrl from "../utils/baseUrl.js";
+import baseUrl from "../utils/baseUrl";
 
 const getUser = async () => {
   const url = `${baseUrl}/api/auth`
diff --git a/client/src/apis/schedule.api.js b/client/src/apis/schedule.api.js
index 1a643fcdeab87f58ca1fecf601eef7684f72e8cb..6bdbb97440c028176d86e081fba821d923a0c343 100644
--- a/client/src/apis/schedule.api.js
+++ b/client/src/apis/schedule.api.js
@@ -1,5 +1,5 @@
 import axios from "axios";
-import baseUrl from "../utils/baseUrl.js";
+import baseUrl from "../utils/baseUrl";
 
 const getOne = async (id, userId = "ku") => {
     const { data } = await axios.get(`${baseUrl}/api/schedule/${userId}?scheduleId=${id}`);
diff --git a/client/src/components/Calendar/Monthly.js b/client/src/components/Calendar/Monthly.js
index a7f797088c43bd00583848bbd7368dd2f6527d4f..fa0786bcb12efe894af6ee257cfd700cf6c33aa0 100644
--- a/client/src/components/Calendar/Monthly.js
+++ b/client/src/components/Calendar/Monthly.js
@@ -1,10 +1,10 @@
 import { useState, useEffect, useRef } from "react";
 import { useHistory } from "react-router-dom";
-import CalendarBtn from "../Buttons/CalendarBtn.js";
-import DatePickerModal from "../Modal/DatePickerModal.js";
+import CalendarBtn from "../Buttons/CalendarBtn";
+import DatePickerModal from "../Modal/DatePickerModal";
 import scheduleApi from "../../apis/schedule.api";
-import { useAuth } from "../../utils/context.js";
-import catchErrors from "../../utils/catchErrors.js";
+import { useAuth } from "../../utils/context";
+import catchErrors from "../../utils/catchErrors";
 import moment from 'moment';
 import FullCalendar from '@fullcalendar/react';
 import dayGridPlugin from '@fullcalendar/daygrid';