diff --git a/Makefile b/Makefile
index 66c58ea..233be48 100644
--- a/Makefile
+++ b/Makefile
@@ -7,5 +7,5 @@ test:
 tdd:
 	bun test --watch
 
-lint:
+check: test
 	bun lint
\ No newline at end of file
diff --git a/domain/AppProjections.ts b/domain/AppProjections.ts
index 55cc1b0..baf23f0 100644
--- a/domain/AppProjections.ts
+++ b/domain/AppProjections.ts
@@ -1,3 +1,4 @@
+import type DomainProjection from "./DomainProjection";
 import ApplicationUpdates from "./projections/ApplicationUpdates";
 
 export default class AppProjections {
diff --git a/domain/DomainEvent.ts b/domain/DomainEvent.ts
index 708dfd2..3a63727 100644
--- a/domain/DomainEvent.ts
+++ b/domain/DomainEvent.ts
@@ -1,4 +1,4 @@
-interface DomainEvent<T> {
+export default interface DomainEvent<T> {
   readonly type: string;
   readonly createdAt: Date;
   readonly payload: T;
diff --git a/domain/DomainProjection.ts b/domain/DomainProjection.ts
index b37bb18..8ba4b9b 100644
--- a/domain/DomainProjection.ts
+++ b/domain/DomainProjection.ts
@@ -1,3 +1,4 @@
-interface DomainProjection {
+import type DomainEvent from "./DomainEvent";
+export default interface DomainProjection {
   handle(event: DomainEvent<any>): void;
 }
diff --git a/domain/EventStore.ts b/domain/EventStore.ts
index 6edfdb1..394bb87 100644
--- a/domain/EventStore.ts
+++ b/domain/EventStore.ts
@@ -1,3 +1,6 @@
+import DomainEvent from "./DomainEvent";
+import DomainProjection from "./DomainProjection";
+
 export default interface EventStore {
   append(event: DomainEvent<any>): void;
   subscribe(projection: DomainProjection): void;
diff --git a/domain/events/ApplicationUpdateStarted.ts b/domain/events/ApplicationUpdateStarted.ts
index b1ebf78..d053670 100644
--- a/domain/events/ApplicationUpdateStarted.ts
+++ b/domain/events/ApplicationUpdateStarted.ts
@@ -1,3 +1,5 @@
+import DomainEvent from "../DomainEvent";
+
 type ApplicationUpdateStartedPayload = {
   id: string;
   newVersion: string;
diff --git a/domain/projections/ApplicationUpdates.ts b/domain/projections/ApplicationUpdates.ts
index 8ceda41..984b745 100644
--- a/domain/projections/ApplicationUpdates.ts
+++ b/domain/projections/ApplicationUpdates.ts
@@ -1,3 +1,6 @@
+import DomainEvent from "../DomainEvent";
+import DomainProjection from "../DomainProjection";
+
 export type UpdateDefinition = {
   id: string;
   newVersion: string;
diff --git a/domain/testing/TestApp.ts b/domain/testing/TestApp.ts
index 6e6e8f9..243aa7e 100644
--- a/domain/testing/TestApp.ts
+++ b/domain/testing/TestApp.ts
@@ -1,5 +1,7 @@
 import AppProjections from "../AppProjections";
 import AppQueries from "../AppQueries";
+import DomainEvent from "../DomainEvent";
+import DomainProjection from "../DomainProjection";
 import EventStore from "../EventStore";
 
 export class TestApp {
diff --git a/infrastructure/FileEventStore.ts b/infrastructure/FileEventStore.ts
index a5d0bbc..a251626 100644
--- a/infrastructure/FileEventStore.ts
+++ b/infrastructure/FileEventStore.ts
@@ -1,6 +1,8 @@
 import { appendFile } from "node:fs/promises";
 import EventStore from "../domain/EventStore";
 import { ApplicationUpdateStarted } from "../domain/events/ApplicationUpdateStarted";
+import DomainEvent from "../domain/DomainEvent";
+import DomainProjection from "../domain/DomainProjection";
 
 export default class FileEventStore implements EventStore {
   private handlers: DomainProjection[] = [];
diff --git a/joe.ts b/joe.ts
index 2f39bc7..7842e77 100644
--- a/joe.ts
+++ b/joe.ts
@@ -15,6 +15,7 @@ const queries = new AppQueries(projections);
 projections.getAll().forEach((projection) => {
   eventStore.subscribe(projection);
 });
+// @ts-ignore Bun handles top-level await
 await eventStore.replay();
 
 // External services
diff --git a/package.json b/package.json
index f5b2d56..0f79f80 100644
--- a/package.json
+++ b/package.json
@@ -1,4 +1,7 @@
 {
+  "scripts": {
+    "lint": "tsc --noEmit --skipLibCheck"
+  },
   "devDependencies": {
     "bun-types": "^1.0.25",
     "msw": "latest"
diff --git a/services/Caprover.test.ts b/services/Caprover.test.ts
index 51bdfce..32c68e3 100644
--- a/services/Caprover.test.ts
+++ b/services/Caprover.test.ts
@@ -71,6 +71,7 @@ describe("Caprover", () => {
 
   describe("Initialization", () => {
     it("should throw an error when no domain is provided", () => {
+      // @ts-ignore toThrowError exists¯\_(ツ)_/¯
       expect(() => new Caprover(new TestApp().eventStore, "")).toThrowError(
         "Missing domain or password"
       );
@@ -78,6 +79,7 @@ describe("Caprover", () => {
     it("should throw an error when no password is provided", () => {
       expect(
         () => new Caprover(new TestApp().eventStore, CAPROVER_TEST_DOMAIN)
+        // @ts-ignore toThrowError exists¯\_(ツ)_/¯
       ).toThrowError("Missing domain or password");
     });
   });
@@ -125,6 +127,7 @@ describe("Caprover", () => {
       it("should throw an error when the application does not exist and not emit any event", async () => {
         await expect(
           caprover.updateApplication("unknown", "adminer:4.2.0")
+          // @ts-ignore toThrowError exists¯\_(ツ)_/¯
         ).rejects.toThrowError(/Failed to update application unknown/);
 
         const events = app.eventStore.getAllEvents();
diff --git a/services/Caprover.ts b/services/Caprover.ts
index d44f06a..eef782f 100644
--- a/services/Caprover.ts
+++ b/services/Caprover.ts
@@ -133,14 +133,15 @@ class Caprover {
     await this.authenticate();
 
     console.debug("-> Caprover Fetching", options?.method, path);
+
+    const headers = new Headers(options?.headers);
+    headers.set("Content-Type", "application/json");
+    headers.set("x-namespace", "captain");
+    headers.set("x-captain-auth", this.authToken);
+
     return fetch(`${this.apiUrl}${path}`, {
       ...options,
-      headers: {
-        "Content-Type": "application/json",
-        ...(options?.headers || {}),
-        "x-namespace": "captain",
-        "x-captain-auth": this.authToken,
-      },
+      headers: headers,
     }).then((res) => {
       console.debug(
         "\t<- Caprover Response",
diff --git a/services/mocks/caproverServer.ts b/services/mocks/caproverServer.ts
index a914f19..c59a414 100644
--- a/services/mocks/caproverServer.ts
+++ b/services/mocks/caproverServer.ts
@@ -1,5 +1,10 @@
+import {
+  http,
+  HttpResponse,
+  HttpResponseResolver,
+  PathParams
+} from "msw";
 import { setupServer } from "msw/node";
-import { http, HttpResponse, HttpResponseResolver, PathParams } from "msw";
 import appsFixtures from "./apps.fixtures.json";
 
 export const CAPROVER_TEST_DOMAIN = "caprover.test";
@@ -14,7 +19,7 @@ const withAuth = (resolver: HttpResponseResolver): HttpResponseResolver => {
       headers.get("x-namespace") !== "captain" ||
       headers.get("x-captain-auth") !== TEST_TOKEN
     ) {
-      return new HttpResponse("", { status: 401 });
+      return HttpResponse.json({}, { status: 401 });
     }
     return resolver(input);
   };