diff --git a/packages/core/src/utils/zod.ts b/packages/core/src/utils/zod.ts
index 3d3b36c55..940fc4ab7 100644
--- a/packages/core/src/utils/zod.ts
+++ b/packages/core/src/utils/zod.ts
@@ -5,6 +5,7 @@ import { conditional } from '@silverhand/essentials';
 import type { OpenAPIV3 } from 'openapi-types';
 import type { ZodStringDef } from 'zod';
 import {
+  ZodRecord,
   ZodArray,
   ZodBoolean,
   ZodEffects,
@@ -201,6 +202,13 @@ export const zodTypeToSwagger = (
     };
   }
 
+  if (config instanceof ZodRecord) {
+    return {
+      type: 'object',
+      additionalProperties: zodTypeToSwagger(config.valueSchema),
+    };
+  }
+
   if (config instanceof ZodArray) {
     return {
       type: 'array',