diff --git a/Proton/ruleset.xml b/Proton/ruleset.xml
index 2e3a8b8..85f881b 100644
--- a/Proton/ruleset.xml
+++ b/Proton/ruleset.xml
@@ -192,9 +192,9 @@
         <exclude name="SlevomatCodingStandard.TypeHints.PropertyTypeHint.MissingTraversableTypeHintSpecification"/>
     </rule>
     <!-- Define unions style -->
-    <rule ref="SlevomatCodingStandard.TypeHints.UnionTypeHintFormat">
+    <rule ref="SlevomatCodingStandard.TypeHints.DNFTypeHintFormat">
         <properties>
-            <property name="withSpaces" value="no" />
+            <property name="withSpacesAroundOperators" value="no" />
             <property name="nullPosition" value="last" />
         </properties>
     </rule>
@@ -238,7 +238,6 @@
             <property name="linesCountAfterDeclare" value="1"/>
         </properties>
     </rule>
-    <rule ref="SlevomatCodingStandard.TypeHints.UnionTypeHintFormat"/>
 
     <rule ref="SlevomatCodingStandard.Exceptions.RequireNonCapturingCatch"/>
 
diff --git a/tests/expected_csv.txt b/tests/expected_csv.txt
index 2da8c68..ff902ba 100644
--- a/tests/expected_csv.txt
+++ b/tests/expected_csv.txt
@@ -59,10 +59,10 @@ Line,Column,Type,Source
 63,62,error,Squiz.Functions.MultiLineFunctionDeclaration.BraceOnSameLine
 6,18,error,PSR12.Files.FileHeader.SpacingInsideBlock
 6,1,error,SlevomatCodingStandard.Namespaces.UnusedUses.UnusedUse
-58,60,error,SlevomatCodingStandard.TypeHints.UnionTypeHintFormat.NullTypeHintNotOnLastPosition
-58,32,error,SlevomatCodingStandard.TypeHints.UnionTypeHintFormat.NullTypeHintNotOnLastPosition
+58,60,error,SlevomatCodingStandard.TypeHints.DNFTypeHintFormat.NullTypeHintNotOnLastPosition
+58,32,error,SlevomatCodingStandard.TypeHints.DNFTypeHintFormat.NullTypeHintNotOnLastPosition
 53,54,error,SlevomatCodingStandard.TypeHints.ReturnTypeHintSpacing.WhitespaceBeforeColon
-53,54,error,SlevomatCodingStandard.TypeHints.UnionTypeHintFormat.DisallowedWhitespace
+53,54,error,SlevomatCodingStandard.TypeHints.DNFTypeHintFormat.DisallowedWhitespaceAroundOperator
 53,52,error,PSR12.Functions.ReturnTypeDeclaration.SpaceBeforeColon
 53,20,error,PSR1.Methods.CamelCapsMethodName.NotCamelCaps
 53,20,error,SlevomatCodingStandard.TypeHints.ParameterTypeHint.MissingAnyTypeHint