diff --git a/.circleci/config.yml b/.circleci/config.yml
index 0f1b52640..4d342f90b 100644
--- a/.circleci/config.yml
+++ b/.circleci/config.yml
@@ -99,7 +99,7 @@ jobs:
       - run:
           working_directory: create-leo-app/template-node
           command: |
-            yarn start
+            yarn dev
 
   template-node-ts:
     executor: rust-node
@@ -108,7 +108,7 @@ jobs:
       - run:
           working_directory: create-leo-app/template-node-ts
           command: |
-            yarn start
+            yarn dev
 
   template-extension:
     executor: rust-node
diff --git a/create-leo-app/template-node-ts/package.json b/create-leo-app/template-node-ts/package.json
index be36c97a3..6c3e3df2f 100644
--- a/create-leo-app/template-node-ts/package.json
+++ b/create-leo-app/template-node-ts/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "build": "rimraf dist/js && rollup --config",
-    "start": "npm run build && node dist/index.js"
+    "dev": "npm run build && node dist/index.js"
   },
   "dependencies": {
     "@provablehq/sdk": "^0.7.0"
diff --git a/create-leo-app/template-node/package.json b/create-leo-app/template-node/package.json
index 0334fe2ba..a37b987a9 100644
--- a/create-leo-app/template-node/package.json
+++ b/create-leo-app/template-node/package.json
@@ -4,7 +4,7 @@
   "version": "0.0.0",
   "type": "module",
   "scripts": {
-    "start": "node index.js"
+    "dev": "node index.js"
   },
   "dependencies": {
     "@provablehq/sdk": "^0.7.0"
diff --git a/create-leo-app/template-offline-public-transaction-ts/package.json b/create-leo-app/template-offline-public-transaction-ts/package.json
index 7d836216e..663095c84 100644
--- a/create-leo-app/template-offline-public-transaction-ts/package.json
+++ b/create-leo-app/template-offline-public-transaction-ts/package.json
@@ -5,7 +5,7 @@
   "type": "module",
   "scripts": {
     "build": "rimraf dist/js && rollup --config",
-    "start": "npm run build && node dist/index.js"
+    "dev": "npm run build && node dist/index.js"
   },
   "dependencies": {
     "@provablehq/sdk": "^0.7.0"
diff --git a/sdk/package.json b/sdk/package.json
index bebc2b24a..52f55fd1a 100644
--- a/sdk/package.json
+++ b/sdk/package.json
@@ -50,7 +50,8 @@
     "@provablehq/wasm": "^0.7.0",
     "comlink": "^4.4.1",
     "mime": "^3.0.0",
-    "sync-request": "^6.1.0"
+    "sync-request": "^6.1.0",
+    "core-js": "^3.38.1"
   },
   "devDependencies": {
     "@rollup/plugin-replace": "^5.0.5",
@@ -63,7 +64,6 @@
     "better-docs": "^2.7.2",
     "chai": "^5.1.1",
     "clean-jsdoc-theme": "^4.1.8",
-    "core-js": "^3.38.1",
     "cpr": "^3.0.1",
     "eslint": "^8.26.0",
     "eslint-config-prettier": "^8.5.0",
diff --git a/sdk/src/polyfill/worker.ts b/sdk/src/polyfill/worker.ts
index 8f979db29..7e05d61a9 100644
--- a/sdk/src/polyfill/worker.ts
+++ b/sdk/src/polyfill/worker.ts
@@ -32,10 +32,11 @@ globalThis.Worker = class Worker extends EventTarget {
         }
 
         const code = `
-            const { workerData } = require("node:worker_threads");
-
-            import(workerData.polyfill)
-                .then(() => import(workerData.url))
+            import("node:worker_threads")
+                .then(({ workerData }) => {
+                    return import(workerData.polyfill)
+                        .then(() => import(workerData.url))
+                })
                 .catch((e) => {
                     // TODO maybe it should send a message to the parent?
                     console.error(e.stack);