diff --git a/pelicanconf.py b/pelicanconf.py
index d2867c6..5f137bc 100644
--- a/pelicanconf.py
+++ b/pelicanconf.py
@@ -32,7 +32,7 @@ TIMEZONE = 'Europe/Paris'
 
 #LANG
 DEFAULT_LANG = 'en'
-LOCALE = 'en_GB.UTF-8'
+LOCALE = 'en_GB.utf8'
 DEFAULT_DATE_FORMAT = '%A, %B %d, %Y'
 I18N_SUBSITES = {
         'fr': {