diff --git a/packages/worker/.npmignore b/packages/worker/.npmignore
index b4be6775d2..b33ab99fc9 100644
--- a/packages/worker/.npmignore
+++ b/packages/worker/.npmignore
@@ -1,4 +1,8 @@
 *
+!/bundle/worker.js
+!/string/**/*
+!/cjs/**/*
+!/esm/**/*
 !/src/**/*
 /src/**/*.spec.ts
 /src/**/*.specHelper.ts
diff --git a/packages/worker/scripts/build-worker-string.js b/packages/worker/scripts/build-worker-string.js
index c84ce8f679..5ed129c060 100755
--- a/packages/worker/scripts/build-worker-string.js
+++ b/packages/worker/scripts/build-worker-string.js
@@ -5,7 +5,15 @@ const fs = require('fs')
 
 const bundlePath = path.resolve(__dirname, '../bundle')
 const workerBundlePath = path.join(bundlePath, 'worker.js')
-const workerStringPath = path.join(bundlePath, 'workerString.ts')
 const workerBundleContent = fs.readFileSync(workerBundlePath, { encoding: 'utf-8' })
 
-fs.writeFileSync(workerStringPath, `export const workerString = ${JSON.stringify(workerBundleContent)}`)
+const workerString = `${JSON.stringify(workerBundleContent)}\n`
+writeOutput('cjs', `exports.workerString = ${workerString}`)
+writeOutput('esm', `export const workerString = ${workerString}`)
+
+function writeOutput(moduleType, content) {
+  const outputPath = path.resolve(__dirname, path.join('..', moduleType, 'entries'))
+  fs.mkdirSync(outputPath, { recursive: true })
+  fs.writeFileSync(path.join(outputPath, 'string.js'), content)
+  fs.writeFileSync(path.join(outputPath, 'string.d.ts'), 'export declare const workerString: string\n')
+}
diff --git a/packages/worker/string/package.json b/packages/worker/string/package.json
index 7827a7c40f..db127a797e 100644
--- a/packages/worker/string/package.json
+++ b/packages/worker/string/package.json
@@ -1,4 +1,6 @@
 {
   "private": true,
-  "main": "../bundle/workerString.ts"
+  "main": "../cjs/entries/string.js",
+  "module": "../esm/entries/string.js",
+  "types": "../cjs/entries/string.d.ts"
 }