diff --git a/inkycal/modules/ical_parser.py b/inkycal/modules/ical_parser.py
index 05fb46d..5b9349a 100644
--- a/inkycal/modules/ical_parser.py
+++ b/inkycal/modules/ical_parser.py
@@ -84,14 +84,19 @@ class iCalendar:
     example: 'path1' (single file) OR ['path1', 'path2'] (multiple files)
     returns a list of iCalendars as string (raw)
     """
-    if type(filepath) == list:
-      ical = (Calendar.from_ical(open(path)) for path in filepath)
-    elif type(filepath) == str:
-      ical = (Calendar.from_ical(open(path)))
+    if isinstance(filepath, list):
+      for path in filepath:
+        with open(path, mode='r') as ical_file:
+          ical = (Calendar.from_ical(ical_file.read()))
+          self.icalendars += ical
+
+    elif isinstance(filepath, str):
+      with open(filepath, mode='r') as ical_file:
+        ical = (Calendar.from_ical(ical_file.read()))
+        self.icalendars += ical
     else:
       raise Exception (f"Input: '{filepath}' is not a string or list!")
 
-    self.icalendars += ical
     logger.info('loaded iCalendars from filepaths')
 
   def get_events(self, timeline_start, timeline_end, timezone=None):