diff --git a/hts/HTS.py b/hts/HTS.py
index e88e240..02102d0 100644
--- a/hts/HTS.py
+++ b/hts/HTS.py
@@ -1,8 +1,8 @@
 #import win32com.client
 import os
 from datetime import datetime, timedelta
-import matplotlib.pyplot as plt
 import pandas as pd
+import matplotlib.pyplot as plt
 import plotly.graph_objects as go
 
 class HTS:
@@ -288,7 +288,7 @@ class HTS:
         #print("날짜", "시간", "시가", "고가", "저가", "종가", "거래량")
         start_time = datetime.strptime(day + " 090000", '%Y%m%d %H%M%S')
         for i in range(size-1, -1, -1):
-            time = datetime.strptime(day+" "+objStockChart.GetDataValue(1, i), '%Y%m%d %H%M%S')
+            time = datetime.strptime(day+" "+str(objStockChart.GetDataValue(1, i)), '%Y%m%d %H%M%S')
             if time < start_time:
                 continue