diff --git a/demo/images/index.md b/demo/images/index.md
index 585d0cba..4bee4d4d 100644
--- a/demo/images/index.md
+++ b/demo/images/index.md
@@ -87,7 +87,7 @@ Start numbering with offset:
 ## Day 1
 
 You can tag section in the `*.md` files  with `<!-- @pg-date <ISO_DATE> -->`, like: `<!-- @pg-date 2015-06-12 -->` to attach them to a date. 
-Then if you group by date, they will show up at the assigned day.
+Then, if you group by date, they will show up at the assigned day.
 
 That mart of the markdown will be removed from the mail markdown at the top and shown only at that day.