diff --git a/MO4/ruleset.xml b/MO4/ruleset.xml
index c9bc17d..66b9bf0 100644
--- a/MO4/ruleset.xml
+++ b/MO4/ruleset.xml
@@ -86,6 +86,21 @@
     <!-- Require exactly one blank line after trait use -->
     <rule ref="PSR12.Traits.UseDeclaration"/>
 
+    <!-- Sort attributes alphabetically -->
+    <rule ref="SlevomatCodingStandard.Attributes.AttributesOrder">
+        <properties>
+            <property name="orderAlphabetically" value="true"/>
+        </properties>
+    </rule>
+    <!-- Attributes should be adjoined to the PHP element they belong to -->
+    <rule ref="SlevomatCodingStandard.Attributes.AttributeAndTargetSpacing"/>
+    <!-- Disallow multiple attributes inside one #[] -->
+    <rule ref="SlevomatCodingStandard.Attributes.DisallowAttributesJoining"/>
+    <!-- Require only one attribute per line -->
+    <rule ref="SlevomatCodingStandard.Attributes.DisallowMultipleAttributesPerLine"/>
+    <!-- Require PHPDoc always before attributes -->
+    <rule ref="SlevomatCodingStandard.Attributes.RequireAttributeAfterDocComment"/>
+
     <!-- Force Enum Spacing-->
     <rule ref="SlevomatCodingStandard.Classes.BackedEnumTypeSpacing"/>
     <!-- Require presence of constant visibility -->
diff --git a/composer.json b/composer.json
index 0f43982..6818084 100644
--- a/composer.json
+++ b/composer.json
@@ -26,7 +26,7 @@
         "php": "~7.2 || ~8.0",
         "dealerdirect/phpcodesniffer-composer-installer": "~0.7 || ~1.0",
         "escapestudios/symfony2-coding-standard": "^3.10.0",
-        "slevomat/coding-standard": "^8.4",
+        "slevomat/coding-standard": "^8.7",
         "squizlabs/php_codesniffer": "^3.6.2"
     },
     "require-dev": {