diff --git a/.gitignore b/.gitignore
index b193144..50f923c 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,4 +1,4 @@
-infection*
+infection/
 coverage
 *.mp4
 .vscode
diff --git a/composer.json b/composer.json
index ad1d9c3..8566832 100644
--- a/composer.json
+++ b/composer.json
@@ -1,6 +1,6 @@
 {
     "name": "danog/tgbot-dialog-id",
-    "description": "A library to work with Telegram bot API dialog IDs",
+    "description": "A library to work with Telegram bot API dialog IDs.",
     "type": "library",
     "autoload": {
         "psr-4": {
diff --git a/infection.json5 b/infection.json5
new file mode 100644
index 0000000..4439301
--- /dev/null
+++ b/infection.json5
@@ -0,0 +1,19 @@
+{
+    "$schema": "vendor/infection/infection/resources/schema.json",
+    "source": {
+        "directories": [
+            "src"
+        ]
+    },
+    "timeout": 10,
+    "logs": {
+        "text": "infection/infection.log",
+        "html": "infection/infection.html",
+        "summary": "infection/summary.log",
+        "perMutator": "infection/per-mutator.md"
+    },
+    "tmpDir": ".infection-cache",
+    "mutators": {
+        "@default": true
+    }
+}