diff --git a/.changeset/dull-monkeys-help.md b/.changeset/dull-monkeys-help.md
new file mode 100644
index 000000000..aa6f965bd
--- /dev/null
+++ b/.changeset/dull-monkeys-help.md
@@ -0,0 +1,5 @@
+---
+"swagger-typescript-api": patch
+---
+
+added support x-propertyNames, propertyNames for object types
diff --git a/src/schema-parser/base-schema-parsers/object.ts b/src/schema-parser/base-schema-parsers/object.ts
index cad7346a3..6731c1e4f 100644
--- a/src/schema-parser/base-schema-parsers/object.ts
+++ b/src/schema-parser/base-schema-parsers/object.ts
@@ -82,12 +82,27 @@ export class ObjectSchemaParser extends MonoSchemaParser {
     });
 
     if (additionalProperties) {
+      const propertyNamesSchema =
+        this.schemaUtils.getSchemaPropertyNamesSchema(schema);
+      let interfaceKeysContent: any;
+
+      if (propertyNamesSchema) {
+        interfaceKeysContent = this.schemaParserFabric
+          .createSchemaParser({
+            schema: propertyNamesSchema,
+            schemaPath: this.schemaPath,
+          })
+          .getInlineParseContent();
+      } else {
+        interfaceKeysContent = this.config.Ts.Keyword.String;
+      }
+
       propertiesContent.push({
         $$raw: { additionalProperties },
         description: "",
         isRequired: false,
         field: this.config.Ts.InterfaceDynamicField(
-          this.config.Ts.Keyword.String,
+          interfaceKeysContent,
           this.config.Ts.Keyword.Any,
         ),
       });
diff --git a/src/schema-parser/base-schema-parsers/primitive.ts b/src/schema-parser/base-schema-parsers/primitive.ts
index 4ed2c0e0a..417350e6e 100644
--- a/src/schema-parser/base-schema-parsers/primitive.ts
+++ b/src/schema-parser/base-schema-parsers/primitive.ts
@@ -8,18 +8,38 @@ export class PrimitiveSchemaParser extends MonoSchemaParser {
       this.schema || {};
 
     if (type === this.config.Ts.Keyword.Object && additionalProperties) {
-      const fieldType =
-        typeof additionalProperties === "object"
-          ? this.schemaParserFabric
-              .createSchemaParser({
-                schema: additionalProperties,
-                schemaPath: this.schemaPath,
-              })
-              .getInlineParseContent()
-          : this.config.Ts.Keyword.Any;
+      const propertyNamesSchema = this.schemaUtils.getSchemaPropertyNamesSchema(
+        this.schema,
+      );
+
+      let recordKeysContent: any;
+      let recordValuesContent: any;
+
+      if (propertyNamesSchema) {
+        recordKeysContent = this.schemaParserFabric
+          .createSchemaParser({
+            schema: propertyNamesSchema,
+            schemaPath: this.schemaPath,
+          })
+          .getInlineParseContent();
+      } else {
+        recordKeysContent = this.config.Ts.Keyword.String;
+      }
+
+      if (typeof additionalProperties === "object") {
+        recordValuesContent = this.schemaParserFabric
+          .createSchemaParser({
+            schema: additionalProperties,
+            schemaPath: this.schemaPath,
+          })
+          .getInlineParseContent();
+      } else {
+        recordValuesContent = this.config.Ts.Keyword.Any;
+      }
+
       contentType = this.config.Ts.RecordType(
-        this.config.Ts.Keyword.String,
-        fieldType,
+        recordKeysContent,
+        recordValuesContent,
       );
     }
 
diff --git a/src/schema-parser/schema-utils.ts b/src/schema-parser/schema-utils.ts
index b731c8bb9..6663a0495 100644
--- a/src/schema-parser/schema-utils.ts
+++ b/src/schema-parser/schema-utils.ts
@@ -53,6 +53,11 @@ export class SchemaUtils {
     );
   };
 
+  getSchemaPropertyNamesSchema = (schema) => {
+    if (!schema) return null;
+    return schema.propertyNames || schema["x-propertyNames"] || null;
+  };
+
   getSchemaRefType = (schema) => {
     if (!this.isRefSchema(schema)) return null;
     return this.schemaComponentsMap.get(schema.$ref);
diff --git a/tests/spec/propertyNames/__snapshots__/basic.test.ts.snap b/tests/spec/propertyNames/__snapshots__/basic.test.ts.snap
new file mode 100644
index 000000000..d4b0c7c85
--- /dev/null
+++ b/tests/spec/propertyNames/__snapshots__/basic.test.ts.snap
@@ -0,0 +1,48 @@
+// Vitest Snapshot v1, https://vitest.dev/guide/snapshot.html
+
+exports[`basic > propertyNames 1`] = `
+"/* eslint-disable */
+/* tslint:disable */
+// @ts-nocheck
+/*
+ * ---------------------------------------------------------------
+ * ## THIS FILE WAS GENERATED VIA SWAGGER-TYPESCRIPT-API        ##
+ * ##                                                           ##
+ * ## AUTHOR: acacode                                           ##
+ * ## SOURCE: https://github.com/acacode/swagger-typescript-api ##
+ * ---------------------------------------------------------------
+ */
+
+export enum KekEnum {
+  /** Creating */
+  Creating = "creating",
+  /** created */
+  Created = "created",
+  /** Starting */
+  Starting = "starting",
+  /** Kkeke */
+  Started = "started",
+  /** dsafads */
+  Restarting = "restarting",
+  /** dasfds */
+  Stopping = "stopping",
+  /** dadd */
+  Stopped = "stopped",
+  /** xzxzxz */
+  Deploy = "deploy",
+  /** axzxe */
+  WaitDependency = "wait_dependency",
+  Updating = "updating",
+}
+
+export type FooBarBazRoot = Record<KekEnum, number>;
+
+export type FooBarBazNoAdditionalProperties = object;
+
+export type FooBarBazNoAdditionalPropertiesPrimitive = object;
+
+export interface FooBarBazNested {
+  dataCount?: Record<KekEnum, number>;
+}
+"
+`;
diff --git a/tests/spec/propertyNames/basic.test.ts b/tests/spec/propertyNames/basic.test.ts
new file mode 100644
index 000000000..8936041af
--- /dev/null
+++ b/tests/spec/propertyNames/basic.test.ts
@@ -0,0 +1,36 @@
+import * as fs from "node:fs/promises";
+import * as os from "node:os";
+import * as path from "node:path";
+
+import { afterAll, beforeAll, describe, expect, test } from "vitest";
+
+import { generateApi } from "../../../src/index.js";
+
+describe("basic", async () => {
+  let tmpdir = "";
+
+  beforeAll(async () => {
+    tmpdir = await fs.mkdtemp(path.join(os.tmpdir(), "swagger-typescript-api"));
+  });
+
+  afterAll(async () => {
+    await fs.rm(tmpdir, { recursive: true });
+  });
+
+  test("propertyNames", async () => {
+    await generateApi({
+      fileName: "schema",
+      input: path.resolve(import.meta.dirname, "schema.yml"),
+      output: tmpdir,
+      silent: true,
+      generateClient: false,
+      generateRouteTypes: true,
+    });
+
+    const content = await fs.readFile(path.join(tmpdir, "schema.ts"), {
+      encoding: "utf8",
+    });
+
+    expect(content).toMatchSnapshot();
+  });
+});
diff --git a/tests/spec/propertyNames/schema.yml b/tests/spec/propertyNames/schema.yml
new file mode 100644
index 000000000..cceb908fe
--- /dev/null
+++ b/tests/spec/propertyNames/schema.yml
@@ -0,0 +1,55 @@
+openapi: 3.0.3
+info:
+  title: teesttt
+  version: 0.0.0
+security:
+  - registryCookieAuth: []
+  - cookieAuth: [ ]
+components:
+  schemas:
+    FooBarBazRoot:
+      type: object
+      propertyNames:
+        $ref: '#/components/schemas/KekEnum'
+      additionalProperties:
+        type: number
+    FooBarBazNoAdditionalProperties:
+      type: object
+      propertyNames:
+        $ref: '#/components/schemas/KekEnum'
+    FooBarBazNoAdditionalPropertiesPrimitive:
+      type: object
+      propertyNames:
+        type: number
+    FooBarBazNested:
+      type: object
+      properties:
+        dataCount:
+          type: object
+          propertyNames:
+            $ref: '#/components/schemas/KekEnum'
+          additionalProperties:
+            type: number
+    KekEnum:
+      type: string
+      enum:
+        - creating
+        - created
+        - starting
+        - started
+        - restarting
+        - stopping
+        - stopped
+        - deploy
+        - wait_dependency
+        - updating
+      x-enum-descriptions:
+        - Creating
+        - created
+        - Starting
+        - Kkeke
+        - dsafads
+        - dasfds
+        - dadd
+        - xzxzxz
+        - axzxe