diff --git a/lib/api/district/schema.js b/lib/api/district/schema.js
index 19ad2b60..6bea9052 100644
--- a/lib/api/district/schema.js
+++ b/lib/api/district/schema.js
@@ -10,7 +10,7 @@ const inseeSchema = object({
     is: true,
     otherwise: schema => schema.required(),
   }),
-})
+}).noUnknown()
 
 const metaSchema = object({
   insee: inseeSchema,
@@ -35,7 +35,7 @@ export const banDistrictSchema = object({
     // eslint-disable-next-line unicorn/no-thenable
     then: schema => schema.default(null).nullable(),
   }),
-})
+}).noUnknown()
 
 export const districtDefaultOptionalValues = {
   config: null,