diff --git a/package.json b/package.json
index 6833c1e3..a2eb2596 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rrweb",
-  "version": "0.9.5",
+  "version": "0.9.6",
   "description": "record and replay the web",
   "scripts": {
     "test": "npm run bundle:browser && cross-env TS_NODE_CACHE=false TS_NODE_FILES=true mocha -r ts-node/register test/**/*.test.ts",
diff --git a/src/replay/index.ts b/src/replay/index.ts
index 21be60cf..d545e11c 100644
--- a/src/replay/index.ts
+++ b/src/replay/index.ts
@@ -330,7 +330,7 @@ export class Replayer {
         this.iframe.contentDocument,
       );
 
-      polyfill(this.iframe.contentWindow);
+      polyfill(this.iframe.contentWindow as Window & typeof globalThis);
     }
   }
 
@@ -894,7 +894,7 @@ export class Replayer {
         parentInDocument = this.iframe.contentDocument.contains(parent);
       } else if (this.iframe.contentDocument.body.contains) {
         // fix for IE
-        // refer 'Internet Explorer notes' at https://developer.mozilla.org/zh-CN/docs/Web/API/Document 
+        // refer 'Internet Explorer notes' at https://developer.mozilla.org/zh-CN/docs/Web/API/Document
         parentInDocument = this.iframe.contentDocument.body.contains(parent);
       }
 
diff --git a/src/utils.ts b/src/utils.ts
index 9cf592d4..4f43f8d2 100644
--- a/src/utils.ts
+++ b/src/utils.ts
@@ -314,7 +314,7 @@ export class TreeIndex {
       const node = mirror.getNode(id);
       node?.childNodes.forEach((childNode) => {
         if ('__sn' in childNode) {
-          deepRemoveFromMirror(((childNode as unknown) as INode).__sn.id)
+          deepRemoveFromMirror(((childNode as unknown) as INode).__sn.id);
         }
       });
     };
diff --git a/typings/utils.d.ts b/typings/utils.d.ts
index 7d6fc9f1..8fd73f85 100644
--- a/typings/utils.d.ts
+++ b/typings/utils.d.ts
@@ -12,7 +12,7 @@ export declare function getWindowWidth(): number;
 export declare function isBlocked(node: Node | null, blockClass: blockClass): boolean;
 export declare function isAncestorRemoved(target: INode): boolean;
 export declare function isTouchEvent(event: MouseEvent | TouchEvent): event is TouchEvent;
-export declare function polyfill(): void;
+export declare function polyfill(win?: Window & typeof globalThis): void;
 export declare function needCastInSyncMode(event: eventWithTime): boolean;
 export declare type TreeNode = {
     id: number;