diff --git a/CHANGELOG.md b/CHANGELOG.md
index 454d89b..c0ca863 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -8,6 +8,8 @@ All notable changes to this project will be documented in this file.
 * `MultilinePromotedPropertiesFixer`: Break promoted properties on multiple lines
 * `ErickSkrauch/blank_line_before_return`: Add a blank line before each return
 * `ErickSkrauch/line_break_after_statements`: Add a blank line after all control statements
+* `concat_space`: Concatenation should be spaced
+* `nullable_type_declaration`: Changes `DateTimeInterface|null` to `?DateTimeInterface`
 
 ## 1.2.3 - 2024-08-23
 ### Changed
diff --git a/src/Config.php b/src/Config.php
index 6895b89..9bf8947 100644
--- a/src/Config.php
+++ b/src/Config.php
@@ -28,6 +28,7 @@ public function getRules() : array {
 			'blank_line_after_namespace' => true,
 			'blank_line_after_opening_tag' => true,
 			'cast_spaces' => ['space' => 'none'],
+			'concat_space' => ['spacing' => 'one'],
 			'curly_braces_position' => [
 				'classes_opening_brace' => 'same_line',
 				'functions_opening_brace' => 'same_line',
@@ -56,6 +57,7 @@ public function getRules() : array {
 			'no_trailing_whitespace_in_comment' => true,
 			'no_unused_imports' => true,
 			'nullable_type_declaration_for_default_null_value' => true,
+			'nullable_type_declaration' => ['syntax' => 'question_mark'],
 			'ordered_imports' => [
 				'imports_order' => ['class', 'function', 'const'],
 				'sort_algorithm' => 'alpha'