diff --git a/manifest.json b/manifest.json
index 2c41f2c..d2231eb 100644
--- a/manifest.json
+++ b/manifest.json
@@ -254,6 +254,7 @@
 		"18-12",
 		"18-13",
 		"18-15",
-		"18-17"
+		"18-17",
+		"18-21"
 	]
 }
\ No newline at end of file