diff --git a/InfinityloopCodingStandard/Sniffs/WhiteSpace/MemberVarSpacingSniff.php b/InfinityloopCodingStandard/Sniffs/WhiteSpace/MemberVarSpacingSniff.php
index 8cfe4e9..a3c9dfc 100644
--- a/InfinityloopCodingStandard/Sniffs/WhiteSpace/MemberVarSpacingSniff.php
+++ b/InfinityloopCodingStandard/Sniffs/WhiteSpace/MemberVarSpacingSniff.php
@@ -10,12 +10,8 @@ class MemberVarSpacingSniff extends \PHP_CodeSniffer\Sniffs\AbstractVariableSnif
     public int $spacingBeforeFirst = 1;
     public bool $ignoreFirstMemberVar = false;
 
-    /**
-     * @return int|void
-     */
     //@phpcs:ignore Squiz.Commenting.FunctionComment.ScalarTypeHintMissing
-    //@phpcs:ignore SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingNativeTypeHint
-    protected function processMemberVar(\PHP_CodeSniffer\Files\File $phpcsFile, $stackPtr)
+    protected function processMemberVar(\PHP_CodeSniffer\Files\File $phpcsFile, $stackPtr) : ?int
     {
         $tokens = $phpcsFile->getTokens();
 
@@ -25,7 +21,7 @@ protected function processMemberVar(\PHP_CodeSniffer\Files\File $phpcsFile, $sta
         $startOfStatement = $phpcsFile->findPrevious($validPrefixes, $stackPtr - 1, null, false, null, true);
 
         if ($startOfStatement === false) {
-            return;
+            return null;
         }
 
         $endOfStatement = $phpcsFile->findNext(\T_SEMICOLON, $stackPtr + 1, null, false, null, true);
@@ -97,13 +93,13 @@ protected function processMemberVar(\PHP_CodeSniffer\Files\File $phpcsFile, $sta
             && isset($tokens[$prev]['scope_condition']) === true
             && $tokens[$tokens[$prev]['scope_condition']]['code'] === \T_FUNCTION
         ) {
-            return;
+            return null;
         }
 
         $prevVar = $phpcsFile->findPrevious(\T_VARIABLE, $first - 1);
 
         if ($this->ignoreFirstMemberVar && $tokens[$prevVar]['code'] !== \T_VARIABLE) {
-            return;
+            return null;
         }
 
         if ($tokens[$prev]['code'] === \T_OPEN_CURLY_BRACKET
@@ -131,7 +127,7 @@ protected function processMemberVar(\PHP_CodeSniffer\Files\File $phpcsFile, $sta
                 return $endOfStatement;
             }
 
-            return;
+            return null;
         }
 
         $data = [
diff --git a/InfinityloopCodingStandard/ruleset.xml b/InfinityloopCodingStandard/ruleset.xml
index 0ee092a..7c09b46 100644
--- a/InfinityloopCodingStandard/ruleset.xml
+++ b/InfinityloopCodingStandard/ruleset.xml
@@ -308,6 +308,7 @@
             </property>
         </properties>
     </rule>
+    <rule ref="SlevomatCodingStandard.Classes.RequireConstructorPropertyPromotion"/>
     <rule ref="SlevomatCodingStandard.Commenting.EmptyComment"/>
     <rule ref="SlevomatCodingStandard.Commenting.InlineDocCommentDeclaration"/>
     <rule ref="SlevomatCodingStandard.Commenting.UselessInheritDocComment"/>
@@ -389,8 +390,10 @@
         </properties>
     </rule>
     <rule ref="SlevomatCodingStandard.ControlStructures.RequireNullCoalesceEqualOperator"/>
+    <rule ref="SlevomatCodingStandard.ControlStructures.RequireNullSafeObjectOperator"/>
     <rule ref="SlevomatCodingStandard.Exceptions.DeadCatch"/>
     <rule ref="SlevomatCodingStandard.Exceptions.ReferenceThrowableOnly"/>
+    <rule ref="SlevomatCodingStandard.Exceptions.RequireNonCapturingCatch"/>
     <rule ref="SlevomatCodingStandard.Namespaces.AlphabeticallySortedUses">
         <properties>
             <property name="psr12Compatible" value="true"/>
@@ -455,6 +458,13 @@
     <rule ref="SlevomatCodingStandard.TypeHints.NullTypeHintOnLastPosition"/>
     <rule ref="SlevomatCodingStandard.TypeHints.DisallowArrayTypeHintSyntax"/>
     <rule ref="SlevomatCodingStandard.TypeHints.PropertyTypeHintSpacing"/>
+    <rule ref="SlevomatCodingStandard.TypeHints.UnionTypeHintFormat">
+        <properties>
+            <property name="withSpaces" value="no"/>
+            <property name="shortNullable" value="yes"/>
+            <property name="nullPosition" value="last"/>
+        </properties>
+    </rule>
     <rule ref="SlevomatCodingStandard.Arrays.DisallowImplicitArrayCreation"/>
     <rule ref="SlevomatCodingStandard.Arrays.TrailingArrayComma">
         <properties>
@@ -469,6 +479,7 @@
     <rule ref="SlevomatCodingStandard.Functions.UselessParameterDefaultValue"/>
     <rule ref="SlevomatCodingStandard.Functions.UnusedInheritedVariablePassedToClosure"/>
     <rule ref="SlevomatCodingStandard.Functions.RequireTrailingCommaInCall"/>
+    <rule ref="SlevomatCodingStandard.Functions.RequireTrailingCommaInDeclaration"/>
     <rule ref="SlevomatCodingStandard.Numbers.DisallowNumericLiteralSeparator"/>
     <rule ref="SlevomatCodingStandard.Operators.DisallowEqualOperators"/>
     <rule ref="SlevomatCodingStandard.Operators.RequireCombinedAssignmentOperator"/>