diff --git a/manifest.json b/manifest.json
index 180bcb57..263aa10c 100644
--- a/manifest.json
+++ b/manifest.json
@@ -334,6 +334,7 @@
 		"13-22",
 		"13-25",
 		"13-28",
+		"13-31",
 		"13-34",
 		"14-title",
 		"14-01",