diff --git a/manifest.json b/manifest.json
index 469fb07..ba6378f 100644
--- a/manifest.json
+++ b/manifest.json
@@ -319,6 +319,7 @@
 		"14-21",
 		"14-23",
 		"14-25",
+		"14-28",
 		"15-title",
 		"16-title",
 		"17-title",