diff -ur v46/to_html.py v47/to_html.py
--- v46/to_html.py	2020-04-05 03:58:15.000000000 +0900
+++ v47/to_html.py	2020-04-05 11:08:00.000000000 +0900
@@ -14,7 +14,7 @@
 	title = a.pop_str('-t')
 	title = add_opt( '-t', title )
 
-	head = a.pop_str('-h')
+	head = a.pop_str( '-h', 'head.yaml' )
 	head = add_opt( '-h', head )
 
 	out = a.pop_str('-o', 'index.html')