diff --git a/package.json b/package.json
index 32b8da8a..cfb61ead 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rrweb-snapshot",
-  "version": "0.7.20",
+  "version": "0.7.21",
   "description": "rrweb's component to take a snapshot of DOM, aka DOM serializer",
   "scripts": {
     "test": "cross-env TS_NODE_CACHE=false TS_NODE_FILES=true mocha -r ts-node/register test/**/*.ts",
diff --git a/typings/index.d.ts b/typings/index.d.ts
index 420b997e..81e7b277 100644
--- a/typings/index.d.ts
+++ b/typings/index.d.ts
@@ -1,4 +1,4 @@
-import snapshot, { serializeNodeWithId } from './snapshot';
+import snapshot, { serializeNodeWithId, transformAttribute } from './snapshot';
 import rebuild, { buildNodeWithSN, addHoverClass } from './rebuild';
 export * from './types';
-export { snapshot, serializeNodeWithId, rebuild, buildNodeWithSN, addHoverClass, };
+export { snapshot, serializeNodeWithId, rebuild, buildNodeWithSN, addHoverClass, transformAttribute, };
diff --git a/typings/snapshot.d.ts b/typings/snapshot.d.ts
index 594b8ccd..fca31217 100644
--- a/typings/snapshot.d.ts
+++ b/typings/snapshot.d.ts
@@ -1,5 +1,7 @@
 import { serializedNodeWithId, INode, idNodeMap } from './types';
 export declare function absoluteToStylesheet(cssText: string, href: string): string;
+export declare function absoluteToDoc(doc: Document, attributeValue: string): string;
+export declare function transformAttribute(doc: Document, name: string, value: string): string;
 export declare function serializeNodeWithId(n: Node | INode, doc: Document, map: idNodeMap, blockClass: string | RegExp, skipChild?: boolean, inlineStylesheet?: boolean, maskAllInputs?: boolean): serializedNodeWithId | null;
 declare function snapshot(n: Document, blockClass?: string | RegExp, inlineStylesheet?: boolean, maskAllInputs?: boolean): [serializedNodeWithId | null, idNodeMap];
 export default snapshot;