diff --git a/pelicanconf.py b/pelicanconf.py
index aad8911..c4cd527 100644
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -14,7 +14,7 @@ TIMEZONE = 'Asia/Seoul'
 DEFAULT_LANG = 'en'
 DEFAULT_DATE = 'fs'
 #20200421T223234+0900_(testt).rst
-FILENAME_METADATA = r'(?P<date>\d{8}T\d{6}\[+-]\d{4})_\((?P<title>.*)\).*'
+FILENAME_METADATA = r'(?P<date>\d{8}T\d{6}\+\d{4})_\((?P<title>.*)\).*'
 SLUGIFY_SOURCE = 'basename'
 
 # Feed generation is usually not desired when developing