diff --git a/manifest.json b/manifest.json
index f03bbf85..29763402 100644
--- a/manifest.json
+++ b/manifest.json
@@ -501,6 +501,7 @@
 		"39-14",
 		"39-17",
 		"39-19",
+		"39-21",
 		"39-22",
 		"39-25",
 		"39-27"