diff --git a/.travis.yml b/.travis.yml
index cbb484d..170ca9d 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -3,6 +3,7 @@ php:
   - 7.1
   - 7.2
   - 7.3
+  - 7.4
 env:
   - dependencies=lowest
   - dependencies=highest
diff --git a/composer.json b/composer.json
index fa2e1ee..03b8696 100644
--- a/composer.json
+++ b/composer.json
@@ -10,15 +10,15 @@
 		"phpstan/phpstan": "^0.12.40"
 	},
 	"require-dev": {
-		"consistence/coding-standard": "^3.7",
+		"consistence/coding-standard": "^3.10",
 		"dealerdirect/phpcodesniffer-composer-installer": "^0.7.0",
 		"ergebnis/composer-normalize": "^2.0.2",
-		"jakub-onderka/php-parallel-lint": "^1.0",
-		"phing/phing": "^2.16.0",
+		"phing/phing": "^2.16.2",
+		"php-parallel-lint/php-parallel-lint": "^1.2",
 		"phpstan/phpstan-phpunit": "^0.12.6",
 		"phpstan/phpstan-strict-rules": "^0.12.1",
 		"phpunit/phpunit": "^7.5.18",
-		"slevomat/coding-standard": "^4.5.2",
+		"slevomat/coding-standard": "^6.4",
 		"webmozart/assert": "^1.7.0"
 	},
 	"config": {
diff --git a/phpcs.xml b/phpcs.xml
index aac1218..54b22d4 100644
--- a/phpcs.xml
+++ b/phpcs.xml
@@ -17,7 +17,7 @@
 			<property name="newlinesCountBetweenOpenTagAndDeclare" value="0"/>
 		</properties>
 	</rule>
-	<rule ref="SlevomatCodingStandard.TypeHints.TypeHintDeclaration">
+	<rule ref="SlevomatCodingStandard.TypeHints.ParameterTypeHint">
 		<properties>
 			<property name="usefulAnnotations" type="array" value="
 				@dataProvider,
@@ -28,8 +28,20 @@
 		<exclude name="SlevomatCodingStandard.TypeHints.TypeHintDeclaration.MissingTraversableParameterTypeHintSpecification"/>
 		<exclude name="SlevomatCodingStandard.TypeHints.TypeHintDeclaration.MissingTraversableReturnTypeHintSpecification"/>
 	</rule>
+	<rule ref="SlevomatCodingStandard.TypeHints.PropertyTypeHint">
+		<properties>
+			<property name="enableNativeTypeHint" value="false"/>
+		</properties>
+		<exclude name="SlevomatCodingStandard.TypeHints.PropertyTypeHint.MissingTraversableTypeHintSpecification"/>
+	</rule>
+	<rule ref="SlevomatCodingStandard.TypeHints.ReturnTypeHint">
+		<properties>
+			<property name="enableObjectTypeHint" value="false"/>
+		</properties>
+		<exclude name="SlevomatCodingStandard.TypeHints.ReturnTypeHint.MissingTraversableTypeHintSpecification"/>
+	</rule>
 	<rule ref="SlevomatCodingStandard.ControlStructures.AssignmentInCondition"/>
-	<rule ref="SlevomatCodingStandard.ControlStructures.DisallowEqualOperators"/>
+	<rule ref="SlevomatCodingStandard.Operators.DisallowEqualOperators"/>
 	<rule ref="SlevomatCodingStandard.ControlStructures.EarlyExit"/>
 	<rule ref="SlevomatCodingStandard.Classes.SuperfluousAbstractClassNaming"/>
 	<rule ref="SlevomatCodingStandard.Classes.SuperfluousInterfaceNaming"/>
diff --git a/src/Type/WebMozartAssert/AssertTypeSpecifyingExtension.php b/src/Type/WebMozartAssert/AssertTypeSpecifyingExtension.php
index ee0feca..abd5da9 100644
--- a/src/Type/WebMozartAssert/AssertTypeSpecifyingExtension.php
+++ b/src/Type/WebMozartAssert/AssertTypeSpecifyingExtension.php
@@ -403,7 +403,9 @@ function (Type $type): Type {
 					return TypeCombinator::removeNull($type);
 				}
 			);
-		} elseif ($methodName === 'allNotInstanceOf') {
+		}
+
+		if ($methodName === 'allNotInstanceOf') {
 			$classType = $scope->getType($node->args[1]->value);
 			if (!$classType instanceof ConstantStringType) {
 				return new SpecifiedTypes([], []);
@@ -417,7 +419,9 @@ function (Type $type) use ($objectType): Type {
 					return TypeCombinator::remove($type, $objectType);
 				}
 			);
-		} elseif ($methodName === 'allNotSame') {
+		}
+
+		if ($methodName === 'allNotSame') {
 			$valueType = $scope->getType($node->args[1]->value);
 			return $this->arrayOrIterable(
 				$scope,