diff --git a/manifest.json b/manifest.json
index ad10f718..c5170d01 100644
--- a/manifest.json
+++ b/manifest.json
@@ -301,6 +301,7 @@
 		"18-15",
 		"18-17",
 		"18-18",
+		"18-21",
 		"18-23"
 	]
 }
\ No newline at end of file