diff --git a/README.md b/README.md
index 20985ee..e44a354 100644
--- a/README.md
+++ b/README.md
@@ -3,6 +3,7 @@
 [![codecov](https://codecov.io/gh/danog/tgbot-dialog-id/branch/master/graph/badge.svg)](https://codecov.io/gh/danog/tgbot-dialog-id)
 [![Psalm coverage](https://shepherd.dev/github/danog/tgbot-dialog-id/coverage.svg)](https://shepherd.dev/github/danog/tgbot-dialog-id)
 [![Psalm level 1](https://shepherd.dev/github/danog/tgbot-dialog-id/level.svg)](https://shepherd.dev/github/danog/tgbot-dialog-id)
+[![Mutation testing badge](https://img.shields.io/endpoint?style=flat&url=https%3A%2F%2Fbadge-api.stryker-mutator.io%2Fgithub.com%2Fdanog%2Ftgbot-dialog-id%2Fmaster)](https://dashboard.stryker-mutator.io/reports/github.com/danog/tgbot-dialog-id/master)
 ![License](https://img.shields.io/github/license/danog/tgbot-dialog-id)
 
 A library to work with Telegram bot API dialog IDs.  
diff --git a/composer.json b/composer.json
index ebe2a3b..683c9b5 100644
--- a/composer.json
+++ b/composer.json
@@ -2,6 +2,7 @@
     "name": "danog/tgbot-dialog-id",
     "description": "A library to work with Telegram bot API dialog IDs",
     "type": "library",
+    "license": "Apache-2.0",
     "autoload": {
         "psr-4": {
             "danog\\DialogId\\": "src/"