diff --git a/fincal/fincal.py b/fincal/fincal.py
index 6a4986d..7524bbb 100644
--- a/fincal/fincal.py
+++ b/fincal/fincal.py
@@ -145,7 +145,7 @@ class TimeSeries(TimeSeriesCore):
         res_string: str = "First date: {}\nLast date: {}\nNumber of rows: {}"
         return res_string.format(self.start_date, self.end_date, total_dates)
 
-    def ffill(self, inplace: bool = False, limit: int = None, skip_weekends: bool = False) -> TimeSeries | None:
+    def ffill(self, inplace: bool = False, limit: int = 1000, skip_weekends: bool = False) -> TimeSeries | None:
         """Forward fill missing dates in the time series
 
         Parameters
@@ -188,7 +188,7 @@ class TimeSeries(TimeSeriesCore):
 
         return self.__class__(new_ts, frequency=self.frequency.symbol)
 
-    def bfill(self, inplace: bool = False, limit: int = None, skip_weekends: bool = False) -> TimeSeries | None:
+    def bfill(self, inplace: bool = False, limit: int = 1000, skip_weekends: bool = False) -> TimeSeries | None:
         """Backward fill missing dates in the time series
 
         Parameters