diff --git a/.vscode/settings.json b/.vscode/settings.json
index d4043a81..bb3833cb 100644
--- a/.vscode/settings.json
+++ b/.vscode/settings.json
@@ -62,6 +62,7 @@
     "pendulumchain",
     "phala",
     "polkadot",
+    "postbuild",
     "precompile",
     "preinstall",
     "rmrk",
diff --git a/package.json b/package.json
index fe66ed2d..ce1e4a46 100644
--- a/package.json
+++ b/package.json
@@ -17,6 +17,7 @@
   "scripts": {
     "preinstall": "npx only-allow pnpm",
     "build": "turbo run build",
+    "postbuild": "npx bun scripts/copy-dts.ts",
     "dev": "turbo run dev",
     "link": "turbo run link",
     "lint": "pnpm biome check .",
diff --git a/scripts/copy-dts.ts b/scripts/copy-dts.ts
new file mode 100644
index 00000000..3b2a0027
--- /dev/null
+++ b/scripts/copy-dts.ts
@@ -0,0 +1,13 @@
+import { copyFile } from 'node:fs/promises';
+import { glob } from 'glob';
+
+async function copyDtsToMts() {
+  const dtsFiles = await glob('packages/*/build/**/*.d.ts');
+
+  for (const file of dtsFiles) {
+    const mtsFile = file.replace('.d.ts', '.d.mts');
+    await copyFile(file, mtsFile);
+  }
+}
+
+copyDtsToMts().catch(console.error);