diff --git a/packages/edge-gateway/package.json b/packages/edge-gateway/package.json
index 61a57b7..7748b68 100644
--- a/packages/edge-gateway/package.json
+++ b/packages/edge-gateway/package.json
@@ -4,10 +4,10 @@
   "description": "IPFS edge gateway for nft.storage",
   "private": true,
   "type": "module",
-  "main": "./dist/worker.mjs",
+  "main": "./dist/worker.js",
   "scripts": {
     "build": "node scripts/cli.js build",
-    "dev": "miniflare --watch --debug",
+    "dev": "miniflare dist/worker.js --watch --debug -m",
     "deploy": "wrangler publish --env production",
     "test": "npm run test:setup && npm run test:worker",
     "test:worker": "ava --verbose test/*.spec.js",
diff --git a/packages/edge-gateway/scripts/build.js b/packages/edge-gateway/scripts/build.js
index ae724ad..00ff9d9 100644
--- a/packages/edge-gateway/scripts/build.js
+++ b/packages/edge-gateway/scripts/build.js
@@ -23,7 +23,7 @@ export async function buildCmd(opts) {
     entryPoints: [path.join(__dirname, '..', 'src', 'index.js')],
     bundle: true,
     format: 'esm',
-    outfile: path.join(__dirname, '..', 'dist', 'worker.mjs'),
+    outfile: path.join(__dirname, '..', 'dist', 'worker.js'),
     legalComments: 'external',
     define: {
       SENTRY_RELEASE: JSON.stringify(sentryRelease),
@@ -53,7 +53,7 @@ export async function buildCmd(opts) {
     })
     await cli.releases.uploadSourceMaps(sentryRelease, {
       include: [path.join(__dirname, '..', 'dist')],
-      ext: ['map', 'mjs'],
+      ext: ['map', 'js'],
     })
     await cli.releases.finalize(sentryRelease)
     await cli.releases.newDeploy(sentryRelease, {
diff --git a/packages/edge-gateway/src/env.js b/packages/edge-gateway/src/env.js
index c3d168d..83f7a29 100644
--- a/packages/edge-gateway/src/env.js
+++ b/packages/edge-gateway/src/env.js
@@ -63,12 +63,8 @@ function getSentry(request, env, ctx) {
     debug: false,
     environment: env.ENV || 'dev',
     rewriteFrames: {
-      // strip . from start of the filename ./worker.mjs as set by cloudflare, to make absolute path `/worker.mjs`
-      iteratee: (frame) => ({
-        ...frame,
-        // @ts-ignore
-        filename: frame.filename.substring(1),
-      }),
+      // sourcemaps only work if stack filepath are absolute like `/worker.js`
+      root: '/',
     },
     release: env.SENTRY_RELEASE,
     pkg,
diff --git a/packages/edge-gateway/test/utils/miniflare.js b/packages/edge-gateway/test/utils/miniflare.js
index e8e2c3c..86d5fa5 100644
--- a/packages/edge-gateway/test/utils/miniflare.js
+++ b/packages/edge-gateway/test/utils/miniflare.js
@@ -11,7 +11,7 @@ export function getMiniflare() {
 
   return new Miniflare({
     envPath,
-    scriptPath: 'dist/worker.mjs',
+    scriptPath: 'dist/worker.js',
     port: 8788,
     packagePath: true,
     wranglerConfigPath: true,
diff --git a/packages/edge-gateway/wrangler.toml b/packages/edge-gateway/wrangler.toml
index 5d6891f..86e3e73 100644
--- a/packages/edge-gateway/wrangler.toml
+++ b/packages/edge-gateway/wrangler.toml
@@ -1,6 +1,6 @@
 # nftstorage.link wrangler config.
 name = "gateway-nft-storage"
-main = "./dist/worker.mjs"
+main = "./dist/worker.js"
 compatibility_date = "2022-07-01"
 compatibility_flags = [ "url_standard" ]
 no_bundle = true