diff --git a/composer.json b/composer.json
index e5922475..1111bb88 100644
--- a/composer.json
+++ b/composer.json
@@ -15,12 +15,12 @@
         "rector/jack": "^1.0",
         "rector/rector-src": "dev-main",
         "rector/swiss-knife": "^2.6",
+        "shipmonk/dead-code-detector": "^1.4",
         "symplify/easy-coding-standard": "^13.2",
         "symplify/phpstan-extensions": "^12.0",
         "symplify/phpstan-rules": "^14.13.1",
         "tomasvotruba/class-leak": "^2.1",
         "tomasvotruba/type-coverage": "^2.3",
-        "tomasvotruba/unused-public": "^2.2",
         "tracy/tracy": "^2.12"
     },
     "autoload": {
diff --git a/phpstan.neon b/phpstan.neon
index 30ec8a0b..a9c27561 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -35,6 +35,11 @@ parameters:
         narrow_return: true
 
     ignoreErrors:
+        # DI container constructors are not dead code
+        -
+            identifier: shipmonk.deadMethod
+            message: '#^Unused .*?::__construct$#'
+
         # phpstan false positive
         - '#Parameter \#1 \$className of method Rector\\PhpParser\\AstResolver\:\:resolveClassMethod\(\) expects class\-string, string given#'