diff --git a/extension.json b/extension.json
index a83ff38..549675c 100644
--- a/extension.json
+++ b/extension.json
@@ -32,5 +32,6 @@
 		"FacebookAdmins": [],
 		"FacebookAppID": "",
 		"AddJSONLD": true
-	}
+	},
+	"manifest_version": 1
 }