diff --git a/backend/instance.ts b/backend/instance.ts
index 7d57154..d751d86 100644
--- a/backend/instance.ts
+++ b/backend/instance.ts
@@ -132,7 +132,7 @@ export class Instances {
                 wss,
                 JSON.stringify({
                   type: "updates",
-                  updates: updates.map(([update]) => update),
+                  updates: updates.map((update) => update),
                 }),
               );
             },
diff --git a/backend/message.test.ts b/backend/message.test.ts
index f1e6068..3f462eb 100644
--- a/backend/message.test.ts
+++ b/backend/message.test.ts
@@ -27,7 +27,7 @@ test("distribute to self", () => {
     return true;
   }, 0);
 
-  client0.sendUpdate({ payload: "Hello" }, "") ;
+  client0.sendUpdate({ payload: "Hello" }, "");
 
   expect(client0Heard).toMatchObject([
     { payload: "Hello", serial: 1, max_serial: 1 },
@@ -80,7 +80,7 @@ test("distribute to self and other", () => {
   ]);
   expect(client1Heard).toMatchObject([
     { payload: "Hello", serial: 1, max_serial: 1 },
-    { payload: "Bye", serial: 2, max_serial: 2 }
+    { payload: "Bye", serial: 2, max_serial: 2 },
   ]);
 
   expect(prepare(getMessages())).toEqual([
@@ -652,7 +652,6 @@ test("distribute to self and other, but other was disconnected", () => {
       type: "sent",
       instanceId: "3001",
       update: { payload: "Hello", serial: 1, max_serial: 1 },
-    
     },
     {
       type: "received",
diff --git a/backend/message.ts b/backend/message.ts
index 6d51b5b..cab5fc2 100644
--- a/backend/message.ts
+++ b/backend/message.ts
@@ -6,9 +6,7 @@ import type {
 import type { Message } from "../types/message";
 import { getColorForId } from "./color";
 
-type UpdateListenerMulti = (
-  updates: ReceivedStatusUpdate<any>[],
-) => boolean;
+type UpdateListenerMulti = (updates: ReceivedStatusUpdate<any>[]) => boolean;
 
 type ClearListener = () => boolean;
 type DeleteListener = () => boolean;
@@ -150,10 +148,7 @@ class Processor implements IProcessor {
     this.clients.splice(client_index, 1);
   }
 
-  distribute(
-    instanceId: string,
-    update: SendingStatusUpdate<any>,
-  ) {
+  distribute(instanceId: string, update: SendingStatusUpdate<any>) {
     this.currentSerial++;
     const receivedUpdate: ReceivedStatusUpdate<any> = {
       ...update,
@@ -187,9 +182,7 @@ class Processor implements IProcessor {
     updateListener(
       this.updates
         .slice(serial)
-        .map((update) => 
-          ({ ...update, max_serial: maxSerial })
-        ),
+        .map((update) => ({ ...update, max_serial: maxSerial })),
     );
   }
 }
diff --git a/sim/create.ts b/sim/create.ts
index afe5e8c..aa60079 100644
--- a/sim/create.ts
+++ b/sim/create.ts
@@ -1,4 +1,4 @@
-import { WebXdc, ReceivedStatusUpdate } from "@webxdc/types";
+import { Webxdc, ReceivedStatusUpdate } from "@webxdc/types";
 
 type UpdatesMessage = {
   type: "updates";
@@ -45,11 +45,11 @@ type Log = (...args: any[]) => void;
 export function createWebXdc(
   transport: Transport,
   log: Log = () => {},
-): WebXdc<any> {
+): Webxdc<any> {
   let resolveUpdateListenerPromise: (() => void) | null = null;
 
-  const webXdc: WebXdc<any> = {
-    sendUpdate: (update) => {
+  const webXdc: Webxdc<any> = {
+    sendUpdate: (update: any) => {
       transport.send({ type: "sendUpdate", update });
       log("send", { update });
     },
diff --git a/sim/webxdc.test.ts b/sim/webxdc.test.ts
index a2fe1f1..8847cd9 100644
--- a/sim/webxdc.test.ts
+++ b/sim/webxdc.test.ts
@@ -27,7 +27,7 @@ class FakeTransport implements Transport {
 
   send(data: any) {
     if (data.type === "sendUpdate") {
-      const { update} = data;
+      const { update } = data;
       this.client.sendUpdate(update, "");
     } else if (data.type === "setUpdateListener") {
       this.client.connect(
diff --git a/sim/webxdc.ts b/sim/webxdc.ts
index f7739a8..7d0130b 100644
--- a/sim/webxdc.ts
+++ b/sim/webxdc.ts
@@ -1,4 +1,4 @@
-import { WebXdc } from "@webxdc/types";
+import { Webxdc } from "@webxdc/types";
 import {
   Transport,
   TransportMessageCallback,
@@ -114,7 +114,7 @@ export class DevServerTransport implements Transport {
   }
 }
 
-function getWebXdc(): WebXdc<any> {
+function getWebXdc(): Webxdc<any> {
   return (window as any).webxdc;
 }