diff --git a/.github/workflows/ci.yaml b/.github/workflows/ci.yaml
index 061d307..9372d66 100644
--- a/.github/workflows/ci.yaml
+++ b/.github/workflows/ci.yaml
@@ -18,14 +18,12 @@ jobs:
                 dependencies:
                     - lowest
                     - highest
-
         services:
             nsqd:
                 image: nsqio/nsq:v1.2.0
                 options: --entrypoint /nsqd
                 ports:
                     - 4150:4150
-
         steps:
             -   name: Checkout
                 uses: actions/checkout@v2
@@ -119,3 +117,32 @@ jobs:
 
             -   name: Run script
                 run: composer psalm
+
+    infection:
+        name: Infection
+        runs-on: ubuntu-latest
+        services:
+            nsqd:
+                image: nsqio/nsq:v1.2.0
+                options: --entrypoint /nsqd
+                ports:
+                    - 4150:4150
+        steps:
+            -   name: Checkout
+                uses: actions/checkout@v2
+
+            -   name: Setup PHP
+                uses: shivammathur/setup-php@v2
+                with:
+                    php-version: '8.0'
+                    coverage: pcov
+
+            -   name: Install dependencies
+                run: composer update --no-progress --no-interaction --prefer-dist
+
+            -   name: Run script
+                env:
+                    STRYKER_DASHBOARD_API_KEY: ${{ secrets.STRYKER_DASHBOARD_API_KEY }}
+                run: |
+                    git fetch --depth=1 origin $GITHUB_BASE_REF
+                    php vendor/bin/infection -j2 --git-diff-filter=A --git-diff-base=origin/$GITHUB_BASE_REF --logger-github --ignore-msi-with-no-mutations --only-covered
diff --git a/.gitignore b/.gitignore
index 4fbb073..6b59151 100644
--- a/.gitignore
+++ b/.gitignore
@@ -1,2 +1,6 @@
 /vendor/
 /composer.lock
+
+/.php_cs.cache
+/.phpunit.result.cache
+/infection.log
diff --git a/README.md b/README.md
index f979630..0a7d9b6 100644
--- a/README.md
+++ b/README.md
@@ -4,8 +4,8 @@
 
 PHP Client for [NSQ](https://nsq.io/).
 
-[![Latest Stable Version](https://poser.pugx.org/nsq/nsq/v)](//packagist.org/packages/nsq/nsq) [![Total Downloads](https://poser.pugx.org/nsq/nsq/downloads)](//packagist.org/packages/nsq/nsq) [![Latest Unstable Version](https://poser.pugx.org/nsq/nsq/v/unstable)](//packagist.org/packages/nsq/nsq) [![License](https://poser.pugx.org/nsq/nsq/license)](//packagist.org/packages/nsq/nsq)
-[![codecov](https://codecov.io/gh/nsqphp/nsqphp/branch/main/graph/badge.svg?token=AYUMC3OO2B)](https://codecov.io/gh/nsqphp/nsqphp)
+[![Latest Stable Version](https://poser.pugx.org/nsq/nsq/v)](//packagist.org/packages/nsq/nsq) [![Total Downloads](https://poser.pugx.org/nsq/nsq/downloads)](//packagist.org/packages/nsq/nsq) [![License](https://poser.pugx.org/nsq/nsq/license)](//packagist.org/packages/nsq/nsq)
+[![codecov](https://codecov.io/gh/nsqphp/nsqphp/branch/main/graph/badge.svg?token=AYUMC3OO2B)](https://codecov.io/gh/nsqphp/nsqphp) [![Mutation testing badge](https://img.shields.io/endpoint?style=flat&url=https%3A%2F%2Fbadge-api.stryker-mutator.io%2Fgithub.com%2Fnsqphp%2Fnsqphp%2Fmain)](https://dashboard.stryker-mutator.io/reports/github.com/nsqphp/nsqphp/main)
 
 This library follow [SemVer](https://semver.org/). Until version 1.0 will be released anything MAY change at any time, public API SHOULD NOT be considered stable. If you want use it before stable version was released install strict version without range.
 
diff --git a/composer.json b/composer.json
index 66c10d6..09ab6b4 100644
--- a/composer.json
+++ b/composer.json
@@ -22,6 +22,7 @@
         "dg/bypass-finals": "^1.3",
         "ergebnis/composer-normalize": "9999999-dev",
         "friendsofphp/php-cs-fixer": "^2.18",
+        "infection/infection": "^0.20.2",
         "phpstan/phpstan": "^0.12.68",
         "phpstan/phpstan-phpunit": "^0.12.17",
         "phpstan/phpstan-strict-rules": "^0.12.9",
diff --git a/infection.json.dist b/infection.json.dist
new file mode 100644
index 0000000..5908b23
--- /dev/null
+++ b/infection.json.dist
@@ -0,0 +1,17 @@
+{
+    "source": {
+        "directories": [
+            "src"
+        ]
+    },
+    "logs": {
+        "text": "infection.log",
+        "github": true,
+        "badge": {
+            "branch": "main"
+        }
+    },
+    "mutators": {
+        "@default": true
+    }
+}