diff --git a/CHANGELOG.md b/CHANGELOG.md
new file mode 100644
index 0000000..4a3fa4a
--- /dev/null
+++ b/CHANGELOG.md
@@ -0,0 +1,5 @@
+# Change Log
+
+## 0.1.0 July 4, 2025
+
+- Initial release
diff --git a/changelog.md b/changelog.md
deleted file mode 100644
index 9a203e1..0000000
--- a/changelog.md
+++ /dev/null
@@ -1,2 +0,0 @@
-Change Log
-==========
diff --git a/composer.json b/composer.json
index 4219351..7fe8f94 100644
--- a/composer.json
+++ b/composer.json
@@ -52,6 +52,7 @@
         "check-dependencies": "./vendor/bin/composer-require-checker check",
         "ecs": "./vendor/bin/ecs --fix",
         "mutation": "./vendor/bin/infection --threads=4 --ignore-msi-with-no-mutations --only-covered --min-msi=100 --min-covered-msi=100",
+        "mutation-static": "./vendor/bin/infection --threads=4 --ignore-msi-with-no-mutations --only-covered --min-msi=100 --min-covered-msi=100 --static-analysis-tool=phpstan",
         "rector": "./vendor/bin/rector process src",
         "static": "./vendor/bin/phpstan --memory-limit=512M",
         "tests": "./vendor/bin/phpunit"
diff --git a/docs/testing.md b/docs/testing.md
index 57eac39..2c92040 100644
--- a/docs/testing.md
+++ b/docs/testing.md
@@ -27,9 +27,15 @@ Mutation testing is checked with [Infection](https://infection.github.io/). To r
 composer run mutation
 ```
 
+With PHPStan analysis, it will also check for static analysis issues during mutation testing.
+
+```shell
+composer run mutation-static
+```
+
 ## Static analysis
 
-The code is statically analyzed with [Phpstan](https://phpstan.org/). To run static analysis.
+The code is statically analyzed with [PHPStan](https://phpstan.org/). To run static analysis.
 
 ```shell
 composer run static
diff --git a/infection.json5 b/infection.json5
index 15361d9..d6406fa 100644
--- a/infection.json5
+++ b/infection.json5
@@ -10,8 +10,5 @@
         "directories": [
             "src"
         ]
-    },
-    "phpStan": {
-        "configDir": "."
-    },
+    }
 }