1 files changed, 1 insertions, 1 deletions
diff --git a/lps_gen.py b/lps_gen.py
index 6c2bf8e..bd410c1 100644
--- a/lps_gen.py
+++ b/lps_gen.py
@@ -267,7 +267,7 @@ class LPiCal(object):
     def to_ical(self):
         """Writes iCal to disk.
         """
-        filename = 'lp%s-schedule.ics' % self.lp_year
+        filename = 'lp{}-schedule.ics'.format(self.lp_year)
         write_file(filename, self.gen_ical())
 
         return filename