diff --git a/package.json b/package.json
index 92211d56..dcdc68ec 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "rrweb",
-  "version": "0.8.5",
+  "version": "0.9.0",
   "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/typings/replay/timer.d.ts b/typings/replay/timer.d.ts
index 0d67d3c0..f15aefa8 100644
--- a/typings/replay/timer.d.ts
+++ b/typings/replay/timer.d.ts
@@ -14,4 +14,4 @@ export declare class Timer {
     toggleLiveMode(mode: boolean): void;
     private findActionIndex;
 }
-export declare function getDelay(event: eventWithTime, baselineTime: number): number;
+export declare function addDelay(event: eventWithTime, baselineTime: number): number;