diff --git a/ehyd_tools/in_out.py b/ehyd_tools/in_out.py
index dceb78a..1e072d9 100644
--- a/ehyd_tools/in_out.py
+++ b/ehyd_tools/in_out.py
@@ -474,8 +474,9 @@ def read_ehyd_file(filepath_or_buffer, series_label='data'):
     # ___________________________
     ts = pd.read_csv(io.StringIO('\n'.join(data).replace(' ', '')), sep=';', decimal=',', index_col=0,
                      na_values='Lücke', header=None,  # names=[series_label],
-                     date_parser=lambda s: pd.to_datetime(s, format='%d.%m.%Y%H:%M:%S')
+                     # date_parser=lambda s: pd.to_datetime(s, format='%d.%m.%Y%H:%M:%S')
                      )
+    ts.index = pd.to_datetime(ts.index, format='%d.%m.%Y%H:%M:%S')
 
     if isinstance(ts, pd.DataFrame):
         ts = ts.dropna(axis=1, how='all')