diff --git a/package.json b/package.json
index 0215231..870b5f3 100644
--- a/package.json
+++ b/package.json
@@ -1,9 +1,10 @@
 {
   "name": "@demouth/mb_strwidth",
-  "version": "1.0.0",
+  "version": "1.1.0",
   "main": "dist/index.js",
   "module": "dist/index.es.js",
   "browser": "dist/mb_strwidth.js",
+  "types": "dist/index.d.ts",
   "repository": "git@github.com:demouth/mb_strwidth.git",
   "author": "demouth <yuya@demouth.net>",
   "license": "MIT",
diff --git a/rollup.config.js b/rollup.config.js
index ad13de1..dbc676f 100644
--- a/rollup.config.js
+++ b/rollup.config.js
@@ -42,7 +42,9 @@ export default [
       }
     ],
     plugins: [
-      pluginTypescript(),
+      pluginTypescript({
+        tsconfig: './tsconfig.json'
+      }),
       pluginCommonjs({
         extensions: ['.js', '.ts'],
       }),
@@ -73,7 +75,9 @@ export default [
       ...Object.keys(pkg.devDependencies || {}),
     ],
     plugins: [
-      pluginTypescript(),
+      pluginTypescript({
+        tsconfig: './tsconfig.json'
+      }),
       pluginCommonjs({
         extensions: ['.js', '.ts'],
       }),
@@ -104,7 +108,9 @@ export default [
       ...Object.keys(pkg.devDependencies || {}),
     ],
     plugins: [
-      pluginTypescript(),
+      pluginTypescript({
+        tsconfig: './tsconfig.json'
+      }),
       pluginCommonjs({
         extensions: ['.js', '.ts'],
       }),
diff --git a/tsconfig.json b/tsconfig.json
index f7daf8f..da5cd03 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -1,4 +1,6 @@
 {
+  "include": ["src"],
+  "exclude": ["dist"],
   "compilerOptions": {
     /* Visit https://aka.ms/tsconfig.json to read more about this file */
 
@@ -42,12 +44,12 @@
     // "maxNodeModuleJsDepth": 1,                        /* Specify the maximum folder depth used for checking JavaScript files from `node_modules`. Only applicable with `allowJs`. */
 
     /* Emit */
-    // "declaration": true,                              /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
+    "declaration": true,                                 /* Generate .d.ts files from TypeScript and JavaScript files in your project. */
     // "declarationMap": true,                           /* Create sourcemaps for d.ts files. */
     // "emitDeclarationOnly": true,                      /* Only output d.ts files and not JavaScript files. */
     // "sourceMap": true,                                /* Create source map files for emitted JavaScript files. */
     // "outFile": "./",                                  /* Specify a file that bundles all outputs into one JavaScript file. If `declaration` is true, also designates a file that bundles all .d.ts output. */
-    // "outDir": "./",                                   /* Specify an output folder for all emitted files. */
+    "outDir": "dist",                                    /* Specify an output folder for all emitted files. */
     // "removeComments": true,                           /* Disable emitting comments. */
     // "noEmit": true,                                   /* Disable emitting files from a compilation. */
     // "importHelpers": true,                            /* Allow importing helper functions from tslib once per project, instead of including them per-file. */
@@ -63,7 +65,7 @@
     // "noEmitHelpers": true,                            /* Disable generating custom helper functions like `__extends` in compiled output. */
     // "noEmitOnError": true,                            /* Disable emitting files if any type checking errors are reported. */
     // "preserveConstEnums": true,                       /* Disable erasing `const enum` declarations in generated code. */
-    // "declarationDir": "./",                           /* Specify the output directory for generated declaration files. */
+    "declarationDir": ".",                               /* Specify the output directory for generated declaration files. */
     // "preserveValueImports": true,                     /* Preserve unused imported values in the JavaScript output that would otherwise be removed. */
 
     /* Interop Constraints */