diff --git a/pelicanconf.py b/pelicanconf.py
index d3f6c2d..7ee4b66 100644
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -16,7 +16,7 @@ DEFAULT_DATE = 'fs'
 #20200421T223234+0900_(testt).rst
 PATH_METADATA = r'(?P<category>[^/]*)/(?P<date>\d{8}T\d{6}[+-]\d{4})_\((?P<title>.*)\)/.*'
 
-SLUGIFY_SOURCE = 'basename'
+SLUGIFY_SOURCE = 'date'
 
 # Feed generation is usually not desired when developing
 FEED_ALL_ATOM = None