diff --git a/app/waf/src/controllers/schema.ts b/app/waf/src/controllers/schema.ts
index 3395b8d67..50b0cf780 100644
--- a/app/waf/src/controllers/schema.ts
+++ b/app/waf/src/controllers/schema.ts
@@ -121,6 +121,7 @@ function buildRequestSchema(
           type: 'object',
           required: requiredProperties,
           properties: properties,
+          additionalProperties: false,
           example: example,
         },
       },