diff --git a/pelicanconf.py b/pelicanconf.py
index f7965b4..a12f5c9 100644
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -15,7 +15,7 @@ DEFAULT_LANG = 'en'
 #DEFAULT_DATE = 'fs'
 #2020-04-15T16-49-26+0900_<title>
 #FILENAME_METADATA = '(?P<title>.*)'
-FILENAME_METADATA = '(?P<date>\d{4}-\d{2}-\d{2})_(?P<title>.*)'
+FILENAME_METADATA = '(?P<date>\d{4}-\d{2}-\d{2})-(?P<title>.*)'
 
 # Feed generation is usually not desired when developing
 FEED_ALL_ATOM = None