diff --git a/blog/blog.go b/blog/blog.go
index 2310d62..a87401c 100644
--- a/blog/blog.go
+++ b/blog/blog.go
@@ -159,6 +159,9 @@
 	for i, a := range authors {
 		if i > 0 {
 			if i == last {
+				if len(authors) > 2 {
+					b.WriteString(",")
+				}
 				b.WriteString(" and ")
 			} else {
 				b.WriteString(", ")