diff --git a/manifest.json b/manifest.json
index 0db16d51..efd87f8d 100644
--- a/manifest.json
+++ b/manifest.json
@@ -240,7 +240,6 @@
 		"13-44",
 		"13-47",
 		"13-49",
-		"13-51",
 		"13-54",
 		"13-57",
 		"14-title",