diff --git a/manifest.json b/manifest.json
index bfc5e16..01a3a01 100644
--- a/manifest.json
+++ b/manifest.json
@@ -346,6 +346,7 @@
 		"21-06",
 		"21-09",
 		"21-12",
+		"21-15",
 		"21-18",
 		"21-20",
 		"21-23",