diff --git a/package.json b/package.json
index 1c2df5f5..2d3e6b43 100644
--- a/package.json
+++ b/package.json
@@ -1,6 +1,6 @@
 {
   "name": "impro",
-  "version": "0.18.203",
+  "version": "0.18.204",
   "type": "module",
   "scripts": {
     "start": "rm -rf \"${BUILD_DIR:-build}\" && NODE_ENV=development eleventy --serve",
diff --git a/src/js/api.js b/src/js/api.js
index be594ee9..b5e21ae8 100644
--- a/src/js/api.js
+++ b/src/js/api.js
@@ -741,10 +741,10 @@ export class Api {
     });
   }
 
-  async unregisterPush({ serviceDid, token }) {
+  async unregisterPush({ serviceDid, token, platform, appId }) {
     await this.request("app.bsky.notification.unregisterPush", {
       method: "POST",
-      body: { serviceDid, token },
+      body: { serviceDid, token, platform, appId },
       headers: {
         "atproto-proxy": `${serviceDid}#bsky_notif`,
       },
diff --git a/src/js/push/courierPushService.js b/src/js/push/courierPushService.js
index d14109b7..a72c9be4 100644
--- a/src/js/push/courierPushService.js
+++ b/src/js/push/courierPushService.js
@@ -202,6 +202,8 @@ export class CourierPushService {
       await this.api.unregisterPush({
         serviceDid: this.serviceDid,
         token: JSON.stringify(subscription),
+        platform: PLATFORM,
+        appId: APP_ID,
       });
     } catch (error) {
       console.error("Failed to unregister push subscription", error);
diff --git a/tests/unit/specs/courierPushService.test.js b/tests/unit/specs/courierPushService.test.js
index 59ac0d1a..823f4d63 100644
--- a/tests/unit/specs/courierPushService.test.js
+++ b/tests/unit/specs/courierPushService.test.js
@@ -170,6 +170,13 @@ describe("CourierPushService registration", () => {
     service.api.unregisterPush = unregisterPush;
     await service.disable();
     assert.equal(unregisterPush.mock.calls.length, 1);
+    const args = unregisterPush.mock.calls[0].arguments[0];
+    assert.equal(args.appId, "social.impro");
+    assert.equal(args.platform, "web");
+    assert.deepEqual(JSON.parse(args.token), {
+      endpoint: SUBSCRIPTION.endpoint,
+      keys: SUBSCRIPTION.keys,
+    });
     assert.equal(service.$enabled.get(), false);
   });