diff --git a/test/api-doc.test.ts b/test/api-doc.test.ts
index a2d7130..152f77f 100644
--- a/test/api-doc.test.ts
+++ b/test/api-doc.test.ts
@@ -3053,6 +3053,13 @@ type TPlatform = 'ios' | 'android' | 'windows' | 'mac' | 'devtools'
         ],
       })
     },
+    initMarkerCluster() {
+      this.mapCtx.initMarkerCluster({
+        enableDefaultStyle: true,
+        zoomOnClick: true,
+        gridSize: 60
+      })
+    }
   })
 }
 
diff --git a/types/wx/lib.wx.api.d.ts b/types/wx/lib.wx.api.d.ts
index cc03b28..54b3223 100644
--- a/types/wx/lib.wx.api.d.ts
+++ b/types/wx/lib.wx.api.d.ts
@@ -3654,7 +3654,7 @@ backgroundAudioManager.src = 'http://ws.stream.qqmusic.qq.com/M500001VfvsJ21xFqb
         /** 接口调用失败的回调函数 */
         fail?: InitMarkerClusterFailCallback
         /** 聚合算法的可聚合距离，即距离小于该值的点会聚合至一起，以像素为单位 */
-        gridSize?: boolean
+        gridSize?: number
         /** 接口调用成功的回调函数 */
         success?: InitMarkerClusterSuccessCallback
         /** 点击已经聚合的标记点时是否实现聚合分离 */