diff --git a/.eslintrc.js b/.eslintrc.cjs
similarity index 100%
rename from .eslintrc.js
rename to .eslintrc.cjs
diff --git a/.size-limit.js b/.size-limit.cjs
similarity index 55%
rename from .size-limit.js
rename to .size-limit.cjs
index 2ec5fcb..801f9bc 100644
--- a/.size-limit.js
+++ b/.size-limit.cjs
@@ -3,8 +3,4 @@ module.exports = [
     path: 'artifacts/dist/index.js',
     limit: '500 B',
   },
-  {
-    path: 'artifacts/dist/index.es.js',
-    limit: '500 B',
-  },
 ]
diff --git a/Makefile b/Makefile
index d994a64..79ec2ea 100644
--- a/Makefile
+++ b/Makefile
@@ -17,7 +17,7 @@ website-%:
 
 ################################################################################
 
-artifacts/dist: rollup.config.js tsconfig.json node_modules $(JS_SOURCE_FILES)
-	node_modules/.bin/rollup --config rollup.config.js
-
+artifacts/dist: tsconfig.build.json node_modules $(JS_SOURCE_FILES)
+	@rm -rf "$@"
+	node_modules/.bin/tsc -p "$<"
 	@touch "$@"
diff --git a/docs/prettier.config.js b/docs/prettier.config.cjs
similarity index 100%
rename from docs/prettier.config.js
rename to docs/prettier.config.cjs
diff --git a/jest.config.js b/jest.config.js
index 6c86bb9..10e057b 100644
--- a/jest.config.js
+++ b/jest.config.js
@@ -1 +1 @@
-module.exports = require('@snout/jest-config')
+export {default} from '@snout/jest-config'
diff --git a/package.json b/package.json
index 8fbb7b7..238bf91 100644
--- a/package.json
+++ b/package.json
@@ -16,12 +16,11 @@
   "publishConfig": {
     "access": "public"
   },
+  "type": "module",
   "main": "artifacts/dist/index.js",
-  "module": "artifacts/dist/index.es.js",
   "typings": "artifacts/dist/index.d.ts",
   "exports": {
-    "import": "./artifacts/dist/index.es.js",
-    "require": "./artifacts/dist/index.js"
+    ".": "./artifacts/dist/index.js"
   },
   "sideEffects": false,
   "files": [
@@ -31,18 +30,17 @@
     "node": ">=14"
   },
   "scripts": {
-    "prepublishOnly": "rollup --config rollup.config.js",
-    "size-limit-build": "rollup --config rollup.config.js",
+    "prepublishOnly": "tsc -p tsconfig.build.json",
+    "size-limit-build": "tsc -p tsconfig.build.json",
     "size-limit-clean": "rm -rf artifacts/dist"
   },
   "dependencies": {
-    "@snout/regexp": "^0.2.1"
+    "@snout/regexp": "^0.3.0"
   },
   "devDependencies": {
     "@size-limit/preset-small-lib": "^5.0.3",
     "@snout/eslint-config": "^2.0.0",
-    "@snout/jest-config": "^1.0.2",
-    "@snout/rollup-config": "^1.1.2",
+    "@snout/jest-config": "^2.1.0",
     "@snout/tsconfig": "^1.0.3",
     "@typescript-eslint/eslint-plugin": "^4.18.0",
     "@typescript-eslint/parser": "^4.18.0",
diff --git a/rollup.config.js b/rollup.config.js
deleted file mode 100644
index 4fbece9..0000000
--- a/rollup.config.js
+++ /dev/null
@@ -1,4 +0,0 @@
-import {createConfig} from '@snout/rollup-config'
-import packageJson from './package.json'
-
-export default createConfig(packageJson)
diff --git a/src/types.ts b/src/types.d.ts
similarity index 100%
rename from src/types.ts
rename to src/types.d.ts
diff --git a/tsconfig.build.json b/tsconfig.build.json
new file mode 100644
index 0000000..f8f2beb
--- /dev/null
+++ b/tsconfig.build.json
@@ -0,0 +1,9 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "outDir": "artifacts/dist",
+  },
+  "include": [
+    "src/**/*"
+  ]
+}