diff --git a/src/__tests__/index.test.ts b/src/__tests__/index.test.ts
index 880a897..e2796f7 100644
--- a/src/__tests__/index.test.ts
+++ b/src/__tests__/index.test.ts
@@ -3,7 +3,7 @@ import { tmpdir } from 'os'
 import { join, resolve } from 'path'
 
 import type { Report } from '../index.d'
-import runPackwatch from '..'
+import packwatch from '..'
 
 async function prepareWorkspace(): Promise<string> {
     const workspacePath = await fs.mkdtemp(`${tmpdir()}/`, { recursive: true })
@@ -53,7 +53,7 @@ describe('Packwatch', () => {
 
     it('warns the user and errors if run away from package.json', async () => {
         workspacePath = await prepareWorkspace()
-        runPackwatch({ cwd: workspacePath })
+        await packwatch({ cwd: workspacePath })
 
         expect(mockLogger.mock.calls).toHaveLength(1)
         expect(mockLogger.mock.calls[0][0]).toEqual(
@@ -68,7 +68,7 @@ describe('Packwatch', () => {
             workspacePath = await prepareWorkspace()
             await createPackageJson(workspacePath)
 
-            runPackwatch({ cwd: workspacePath })
+            await packwatch({ cwd: workspacePath })
 
             const generatedManifest = await fs.readFile(
                 resolve(join(workspacePath, '.packwatch.json')),
@@ -84,7 +84,7 @@ describe('Packwatch', () => {
             workspacePath = await prepareWorkspace()
             await createPackageJson(workspacePath)
 
-            runPackwatch({ cwd: workspacePath })
+            await packwatch({ cwd: workspacePath })
 
             expect(mockLogger.mock.calls).toHaveLength(2)
             expect(mockLogger.mock.calls[0][0]).toEqual(
@@ -104,7 +104,7 @@ describe('Packwatch', () => {
 
             await createPackageJson(workspacePath)
 
-            runPackwatch({ cwd: workspacePath, isUpdatingManifest: true })
+            await packwatch({ cwd: workspacePath, isUpdatingManifest: true })
 
             expect(mockLogger.mock.calls).toHaveLength(1)
             expect(mockLogger.mock.calls[0][0]).toEqual(
@@ -125,7 +125,7 @@ describe('Packwatch', () => {
                 packageSize: '160B',
                 unpackedSize: '150B',
             })
-            runPackwatch({ cwd: workspacePath })
+            await packwatch({ cwd: workspacePath })
             expect(mockLogger.mock.calls).toHaveLength(1)
             expect(mockLogger.mock.calls[0][0]).toEqual(
                 expect.stringMatching(
@@ -144,7 +144,7 @@ describe('Packwatch', () => {
                 unpackedSize: '150B',
             })
 
-            runPackwatch({ cwd: workspacePath })
+            await packwatch({ cwd: workspacePath })
             expect(mockLogger.mock.calls).toHaveLength(1)
             expect(mockLogger.mock.calls[0][0]).toEqual(
                 expect.stringMatching(
@@ -162,7 +162,7 @@ describe('Packwatch', () => {
                 unpackedSize: '140B',
             })
 
-            runPackwatch({ cwd: workspacePath })
+            await packwatch({ cwd: workspacePath })
             expect(mockLogger.mock.calls).toHaveLength(1)
             expect(mockLogger.mock.calls[0][0]).toEqual(
                 expect.stringMatching(
@@ -180,7 +180,7 @@ describe('Packwatch', () => {
                 unpackedSize: '140B',
             })
 
-            runPackwatch({ cwd: workspacePath })
+            await packwatch({ cwd: workspacePath })
             expect(mockLogger.mock.calls).toHaveLength(1)
             expect(mockLogger.mock.calls[0][0]).toEqual(
                 expect.stringMatching(
@@ -198,7 +198,7 @@ describe('Packwatch', () => {
                 unpackedSize: '140B',
             })
 
-            runPackwatch({ cwd: workspacePath })
+            await packwatch({ cwd: workspacePath })
             expect(mockLogger.mock.calls).toHaveLength(1)
             expect(mockLogger.mock.calls[0][0]).toEqual(
                 expect.stringMatching(
@@ -217,7 +217,7 @@ describe('Packwatch', () => {
                 unpackedSize: '140B',
             })
 
-            runPackwatch({ cwd: workspacePath, isUpdatingManifest: true })
+            await packwatch({ cwd: workspacePath, isUpdatingManifest: true })
             expect(mockLogger.mock.calls).toHaveLength(1)
             expect(mockLogger.mock.calls[0][0]).toEqual(
                 expect.stringMatching(
diff --git a/src/cli.ts b/src/cli.ts
index a13de2f..3d830c3 100644
--- a/src/cli.ts
+++ b/src/cli.ts
@@ -1,8 +1,9 @@
 #!/usr/bin/env node
 
-import runPackwatch from '.'
+import packwatch from '.'
 
 const isUpdatingManifest = process.argv.includes('--update-manifest')
 const cwd = process.cwd()
-const processExit = runPackwatch({ cwd, isUpdatingManifest })
-process.exit(processExit)
+packwatch({ cwd, isUpdatingManifest })
+    .catch(() => process.exit(1))
+    .then(() => process.exit(0))
diff --git a/src/index.ts b/src/index.ts
index faced80..4a799f6 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -9,13 +9,13 @@ import {
 
 const MANIFEST_FILENAME = '.packwatch.json'
 
-export default function run({
+export default async function packwatch({
     cwd,
     isUpdatingManifest,
 }: {
     cwd?: string
     isUpdatingManifest?: boolean
-}): number {
+}): Promise<void> {
     const packageJsonPath = resolve(join(cwd, 'package.json'))
     const manifestPath = resolve(join(cwd, MANIFEST_FILENAME))