diff --git a/CHANGELOG.md b/CHANGELOG.md
index f59aef0..2fc2f2e 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -1,5 +1,9 @@
+
 # Changelog
 
+## v3.1.1
+- Fixes for typings.
+
 ## v3.1.0
 - Add support for ES modules.
 
diff --git a/index.d.ts b/index.d.ts
index 327bbc1..50c48bd 100644
--- a/index.d.ts
+++ b/index.d.ts
@@ -2,4 +2,5 @@
 /**
  * Check if a Node.js Buffer or Uint8Array is UTF-8.
  */
-export default function isUtf8(buf?: Buffer | Uint8Array): boolean;
+declare function isUtf8(buf?: Buffer | Uint8Array): boolean;
+export = isUtf8;
diff --git a/package.json b/package.json
index 3458ebd..b22ec91 100644
--- a/package.json
+++ b/package.json
@@ -1,7 +1,7 @@
 {
   "name": "isutf8",
   "description": "Check if a Node.js Buffer or Uint8Array is utf-8",
-  "version": "3.1.0",
+  "version": "3.1.1",
   "author": {
     "name": "Denis Seleznev",
     "email": "hcodes@yandex.ru",
diff --git a/tsconfig.json b/tsconfig.json
index ff081b5..8207eb9 100644
--- a/tsconfig.json
+++ b/tsconfig.json
@@ -6,10 +6,11 @@
         "allowJs": false,
         "declaration": true,
         "target": "es6",
-        "outDir": "./lib",
+        "outDir": "./dist",
         "lib": [
             "es6",
         ],
+        "esModuleInterop": true,
         "strict": true,
         "alwaysStrict": true,
         "strictFunctionTypes": true,