diff --git a/src/lib/validations/auth.ts b/src/lib/validations/auth.ts
index e7e94d9db..7c899cf61 100644
--- a/src/lib/validations/auth.ts
+++ b/src/lib/validations/auth.ts
@@ -65,6 +65,7 @@ export const profileSchema = z.object({
   // the iOS client contract). Surfaced on the FHIR `Coverage` payor.
   insurerIkNumber: z
     .string()
+    .max(32)
     .nullable()
     .optional()
     .transform((v) => {