diff --git a/.npmignore b/.npmignore
deleted file mode 100644
index 390ccd2..0000000
--- a/.npmignore
+++ /dev/null
@@ -1,13 +0,0 @@
-.c8rc
-.editorconfig
-.github/
-.mocharc.cjs
-.ncurc
-.vscode/
-coverage/
-eslint.config.js
-test/
-tools/
-tsconfig.json
-typedoc.config.cjs
-docs/
diff --git a/package.json b/package.json
index 8634eff..47c8fac 100644
--- a/package.json
+++ b/package.json
@@ -5,6 +5,10 @@
   "main": "lib/index.js",
   "type": "module",
   "types": "types/index.d.ts",
+  "files": [
+    "lib",
+    "types"
+  ],
   "repository": {
     "type": "git",
     "url": "git+https://github.com/cto-af/string-width.git"