diff --git a/lightweight_charts/abstract.py b/lightweight_charts/abstract.py
index 0091d3f2..1e7ea6d0 100644
--- a/lightweight_charts/abstract.py
+++ b/lightweight_charts/abstract.py
@@ -198,9 +198,13 @@ def _df_datetime_format(self, df: pd.DataFrame, exclude_lowercase=None):
         df = df.copy()
         df.columns = self._format_labels(df, df.columns, df.index, exclude_lowercase)
         self._set_interval(df)
+
         if not pd.api.types.is_datetime64_any_dtype(df['time']):
             df['time'] = pd.to_datetime(df['time'])
-        df['time'] = df['time'].astype('int64') // 10 ** 9
+
+        df['time'] = pd.to_datetime(df['time']).dt.tz_localize(None).astype('datetime64[ns]')
+
+        df['time'] = df['time'].astype('int64') // 10**9
         return df
 
     def _series_datetime_format(self, series: pd.Series, exclude_lowercase=None):
diff --git a/lightweight_charts/widgets.py b/lightweight_charts/widgets.py
index c347c45d..10bf72f5 100644
--- a/lightweight_charts/widgets.py
+++ b/lightweight_charts/widgets.py
@@ -164,7 +164,7 @@ def _load(self):
 
 
 class JupyterChart(StaticLWC):
-    def __init__(self, width: int = 800, height=350, inner_width=1, inner_height=1, scale_candles_only: bool = False, toolbox: bool = False):
+    def __init__(self, width: int = 800, height=350, inner_width: float=1.0, inner_height: float=1.0, scale_candles_only: bool = False, toolbox: bool = False):
         super().__init__(width, height, inner_width, inner_height, scale_candles_only, toolbox, False)
 
         self.run_script(f'''
@@ -177,7 +177,7 @@ def __init__(self, width: int = 800, height=350, inner_width=1, inner_height=1,
             document.getElementById('container').style.width = '{self.width}px'
             document.getElementById('container').style.height = '100%'
             ''')
-        self.run_script(f'{self.id}.chart.resize({width}, {height})')
+        self.run_script(f'{self.id}.chart.resize({width * inner_width}, {height * inner_height})')
 
     def _load(self):
         if HTML is None: