diff --git a/HardMode/ruleset.xml b/HardMode/ruleset.xml
index 27d17a1..567ac0a 100644
--- a/HardMode/ruleset.xml
+++ b/HardMode/ruleset.xml
@@ -2,7 +2,7 @@
 <ruleset
         name="HardMode"
         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
-        xsi:noNamespaceSchemaLocation="vendor/squizlabs/php_codesniffer/phpcs.xsd">
+        xsi:noNamespaceSchemaLocation="../vendor/squizlabs/php_codesniffer/phpcs.xsd">
 
     <!-- Import the Doctrine coding standard -->
     <rule ref="Doctrine"/>
@@ -62,8 +62,19 @@
     <rule ref="SlevomatCodingStandard.ControlStructures.NewWithParentheses">
         <severity>0</severity>
     </rule>
+    <rule ref="PSR12.Classes.ClassInstantiation.MissingParentheses">
+        <severity>0</severity>
+    </rule>
     <rule ref="SlevomatCodingStandard.ControlStructures.NewWithoutParentheses"/>
 
+    <!-- Do not require an empty line after if/for/etc. -->
+    <rule ref="SlevomatCodingStandard.ControlStructures.BlockControlStructureSpacing.IncorrectLinesCountAfterControlStructure">
+        <severity>0</severity>
+    </rule>
+    <rule ref="SlevomatCodingStandard.ControlStructures.JumpStatementsSpacing.IncorrectLinesCountBeforeControlStructure">
+        <severity>0</severity>
+    </rule>
+
     <!-- Do not require closures not referencing $this be static -->
     <rule ref="SlevomatCodingStandard.Functions.StaticClosure">
         <severity>0</severity>
@@ -93,6 +104,10 @@
             <property name="newlinesCountAfterDeclare" value="2"/>
         </properties>
     </rule>
+    <!-- Declare strict type on the same line as opening tag -->
+    <rule ref="PSR12.Files.OpenTag.NotAlone">
+        <severity>0</severity>
+    </rule>
 
     <!-- Require no space before colon in return types -->
     <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHintSpacing">
@@ -117,13 +132,18 @@
     </rule>
 
     <!-- More lax rules about `array` type-hints (no need to always detail what's in the array) -->
-    <rule ref="SlevomatCodingStandard.TypeHints.TypeHintDeclaration.MissingTraversablePropertyTypeHintSpecification">
+    <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingTraversableTypeHintSpecification">
         <severity>0</severity>
     </rule>
-    <rule ref="SlevomatCodingStandard.TypeHints.TypeHintDeclaration.MissingTraversableParameterTypeHintSpecification">
+    <rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingTraversableTypeHintSpecification">
         <severity>0</severity>
     </rule>
-    <rule ref="SlevomatCodingStandard.TypeHints.TypeHintDeclaration.MissingTraversableReturnTypeHintSpecification">
+    <rule ref="SlevomatCodingStandard.TypeHints.PropertyTypeHint.MissingTraversableTypeHintSpecification">
+        <severity>0</severity>
+    </rule>
+
+    <!-- Anonymous classes -->
+    <rule ref="PSR12.Classes.AnonClassDeclaration.SpaceAfterKeyword">
         <severity>0</severity>
     </rule>
 
@@ -136,9 +156,22 @@
         <exclude-pattern type="relative">tests/*</exclude-pattern>
     </rule>
 
+    <!-- For short anonymous classes in tests -->
+    <rule ref="Squiz.WhiteSpace.FunctionSpacing.Before">
+        <exclude-pattern type="relative">tests/*</exclude-pattern>
+    </rule>
+
     <!-- Do not enforce return types in tests else it crowds the test methods with `: void` -->
-    <rule ref="SlevomatCodingStandard.TypeHints.TypeHintDeclaration.MissingReturnTypeHint">
+    <rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingNativeTypeHint">
         <exclude-pattern type="relative">tests/*</exclude-pattern>
     </rule>
 
+
+    <!-- ########################-->
+    <!-- For PHP 7.4+ only       -->
+    <!-- ########################-->
+    <rule ref="SlevomatCodingStandard.TypeHints.PropertyTypeHint.MissingNativeTypeHint">
+        <severity>0</severity>
+    </rule>
+
 </ruleset>
diff --git a/composer.json b/composer.json
index 77545d5..398eee3 100644
--- a/composer.json
+++ b/composer.json
@@ -4,6 +4,6 @@
     "description": "Hard mode for PHP",
     "license": "MIT",
     "require": {
-        "doctrine/coding-standard": "^6.0"
+        "doctrine/coding-standard": "^8.0"
     }
 }