diff --git a/packages/core/package.json b/packages/core/package.json
index 69381bc..a2b8edf 100644
--- a/packages/core/package.json
+++ b/packages/core/package.json
@@ -25,13 +25,13 @@
   },
   "exports": {
     ".": {
-      "types": "./dist/index.d.mts",
-      "import": "./dist/index.mjs"
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
     }
   },
-  "main": "./dist/index.mjs",
-  "module": "./dist/index.mjs",
-  "types": "./dist/index.d.mts",
+  "main": "./dist/index.js",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
   "files": [
     "dist"
   ],
diff --git a/packages/react/tsdown.config.ts b/packages/react/tsdown.config.ts
index ee80779..13f1225 100644
--- a/packages/react/tsdown.config.ts
+++ b/packages/react/tsdown.config.ts
@@ -5,6 +5,7 @@ export default defineConfig({
     index: './src/index.ts',
   },
   target: ['es2024'],
+  format: 'esm',
   clean: true,
   dts: true,
   platform: 'browser',
diff --git a/packages/solid/tsdown.config.ts b/packages/solid/tsdown.config.ts
index 583a909..ae4700a 100644
--- a/packages/solid/tsdown.config.ts
+++ b/packages/solid/tsdown.config.ts
@@ -6,6 +6,7 @@ export default defineConfig({
     index: './src/index.ts',
   },
   target: ['es2024'],
+  format: 'esm',
   clean: true,
   dts: true,
   platform: 'browser',
diff --git a/packages/svelte/tsdown.config.ts b/packages/svelte/tsdown.config.ts
index a5d4157..924eb32 100644
--- a/packages/svelte/tsdown.config.ts
+++ b/packages/svelte/tsdown.config.ts
@@ -7,6 +7,7 @@ export default defineConfig({
     index: './src/index.ts',
   },
   target: ['es2024'],
+  format: 'esm',
   clean: true,
   dts: true,
   platform: 'browser',
diff --git a/packages/ts/package.json b/packages/ts/package.json
index 9fb2b14..df2a04e 100644
--- a/packages/ts/package.json
+++ b/packages/ts/package.json
@@ -24,13 +24,13 @@
   },
   "exports": {
     ".": {
-      "types": "./dist/index.d.mts",
-      "import": "./dist/index.mjs"
+      "types": "./dist/index.d.ts",
+      "import": "./dist/index.js"
     }
   },
-  "main": "./dist/index.mjs",
-  "module": "./dist/index.mjs",
-  "types": "./dist/index.d.mts",
+  "main": "./dist/index.js",
+  "module": "./dist/index.js",
+  "types": "./dist/index.d.ts",
   "files": [
     "dist"
   ],
diff --git a/packages/ts/tsdown.config.ts b/packages/ts/tsdown.config.ts
index 1315065..32c9d16 100644
--- a/packages/ts/tsdown.config.ts
+++ b/packages/ts/tsdown.config.ts
@@ -5,6 +5,7 @@ export default defineConfig({
     index: './src/index.ts',
   },
   target: ['es2024'],
+  platform: 'browser',
   format: 'esm',
   clean: true,
   dts: true,