diff --git a/.github/schema.json b/.github/schema.json
index ef6d1910..59cf5c4b 100644
--- a/.github/schema.json
+++ b/.github/schema.json
@@ -6,6 +6,9 @@
 		"title": {
 			"type": "string"
 		},
+		"subtitle": {
+			"type": "string"
+		},
 		"description": {
 			"type": "string"
 		},