diff --git a/composer.json b/composer.json
index b59cad47..10595cd6 100644
--- a/composer.json
+++ b/composer.json
@@ -59,6 +59,7 @@
 		"phpstan/phpstan-phpunit": "1.4.2",
 		"phpstan/phpstan-strict-rules": "1.6.1",
 		"phpunit/phpunit": "9.6.22",
+		"rector/type-perfect": "1.0.0",
 		"saschaegerer/phpstan-typo3": "1.10.2",
 		"seld/jsonlint": "1.11.0",
 		"spaze/phpstan-disallowed-calls": "4.3.1",
diff --git a/phpstan.neon b/phpstan.neon
index c36734a9..da35f33e 100644
--- a/phpstan.neon
+++ b/phpstan.neon
@@ -30,6 +30,13 @@ parameters:
     class: 10
     function: 5
 
+  type_perfect:
+    no_mixed_property: true
+    no_mixed_caller: true
+    null_over_false: true
+    narrow_param: true
+    narrow_return: true
+
   disallowedFunctionCalls:
     -
       function:
@@ -40,12 +47,14 @@ parameters:
     -
       function: 'header()'
       message: 'Use PSR-7 API instead'
+
   disallowedStaticCalls:
     -
       method:
         - 'TYPO3\CMS\Extbase\Utility\DebuggerUtility::var_dump()'
         - 'TYPO3\CMS\Core\Utility\DebugUtility::debug()'
       message: 'Use logging instead or remove if it was for debugging purposes.'
+
   disallowedSuperglobals:
     -
       superglobal:
@@ -54,6 +63,7 @@ parameters:
         - '$_FILES'
         - '$_SERVER'
       message: 'Use PSR-7 API instead'
+
   ignoreErrors:
     -
       message: '#Out of 1 possible constant types#'