diff --git a/apps/playground-web/src/app/insight/[blueprint_slug]/blueprint-playground.client.tsx b/apps/playground-web/src/app/insight/[blueprint_slug]/blueprint-playground.client.tsx
index 20f5b478b90..23d902c05ad 100644
--- a/apps/playground-web/src/app/insight/[blueprint_slug]/blueprint-playground.client.tsx
+++ b/apps/playground-web/src/app/insight/[blueprint_slug]/blueprint-playground.client.tsx
@@ -799,7 +799,7 @@ function openAPIV3ParamToZodFormSchema(
 
         if (itemSchema) {
           return isRequired
-            ? z.array(itemSchema)
+            ? z.array(itemSchema).min(1, { message: "Required" })
             : z.array(itemSchema).optional();
         }
       }