diff --git a/config.schema.json b/config.schema.json
index 851a9e4..fd5e26b 100644
--- a/config.schema.json
+++ b/config.schema.json
@@ -137,6 +137,7 @@
     },
     "items": {
       "type": "array",
+      "maxItems": 16,
       "items": {
         "oneOf": [
           {