diff --git a/quantcommon.py b/quantcommon.py
index a2cea81..fbb8c14 100644
--- a/quantcommon.py
+++ b/quantcommon.py
@@ -55,14 +55,14 @@ class QuantCommon:
 
         return value_list
 
-    def get_price_list(self):
+    def get_price_list(self, interval_month):
         engine = self.create_engine()
 
         try:
-            price_list = pd.read_sql("""
+            price_list = pd.read_sql(f"""
             select 날짜, 종가, 종목코드
             from kor_price
-            where 날짜 >= (select (select max(날짜) from kor_price) - interval 1 year);
+            where 날짜 >= (select (select max(날짜) from kor_price) - interval {interval_month} month);
             """, con=engine)
         finally:
             engine.dispose()