diff --git a/packages/partywhen/README.md b/packages/partywhen/README.md
index 1a7e9a5b..d6b058f0 100644
--- a/packages/partywhen/README.md
+++ b/packages/partywhen/README.md
@@ -36,6 +36,7 @@ export default {
 
 A task has a few parts:
 
+- **id**: a unique identifier for the task
 - **description**: which is a string that you can use to identify the task
 - **payload**: which is a JSON object that is passed to the task
 - **type**: which is one of "delayed", "cron", or "scheduled"
@@ -54,6 +55,7 @@ Here are some examples:
 
   ```ts
   scheduler.scheduleTask({
+    id: "my-task",
     description: "my-task",
     type: "delayed",
     delayInSeconds: 60,
@@ -71,6 +73,7 @@ Here are some examples:
 
   ```ts
   scheduler.scheduleTask({
+    id: "my-task",
     description: "my-task",
     type: "cron",
     cron: "0 18 * * 5",
@@ -90,6 +93,7 @@ Here are some examples:
 
   ```ts
   scheduler.scheduleTask({
+    id: "my-task",
     description: "my-task",
     type: "scheduled",
     time: new Date("2024-01-01T12:00:00Z"),
diff --git a/packages/partywhen/src/index.ts b/packages/partywhen/src/index.ts
index cf47a8b0..b7800264 100644
--- a/packages/partywhen/src/index.ts
+++ b/packages/partywhen/src/index.ts
@@ -63,6 +63,7 @@ type Callback =
   | {
       type: "webhook";
       url: string;
+      headers?: Record<string, string>;
     }
   | {
       type: "durable-object";
@@ -359,6 +360,7 @@ export class Scheduler<Env> extends Server<Env> {
           method: "POST",
           body: JSON.stringify(task),
           headers: {
+            ...(task.callback.headers || {}),
             "Content-Type": "application/json"
           }
         });