diff --git a/manifest.json b/manifest.json
index 05ac9f1..abd0a37 100644
--- a/manifest.json
+++ b/manifest.json
@@ -322,6 +322,7 @@
 		"21-09",
 		"21-12",
 		"21-15",
+		"21-18",
 		"21-20",
 		"21-23",
 		"21-25",