diff --git a/CHANGELOG.md b/CHANGELOG.md
index b8f2f8e..5140886 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,6 +7,7 @@
   target type
 * feat: Constructor arguments
 * test: Custom transformer
+* refactor: Move `MixedType` to contracts
 
 ## 0.5.3
 
diff --git a/src/Model/MixedType.php b/src/Contracts/MixedType.php
similarity index 94%
rename from src/Model/MixedType.php
rename to src/Contracts/MixedType.php
index 5f4b49d..13b5105 100644
--- a/src/Model/MixedType.php
+++ b/src/Contracts/MixedType.php
@@ -11,7 +11,7 @@
  * that was distributed with this source code.
  */
 
-namespace Rekalogika\Mapper\Model;
+namespace Rekalogika\Mapper\Contracts;
 
 /**
  * Sentinel class to indicate mixed type
diff --git a/src/Contracts/TypeMapping.php b/src/Contracts/TypeMapping.php
index b3d67eb..c60d421 100644
--- a/src/Contracts/TypeMapping.php
+++ b/src/Contracts/TypeMapping.php
@@ -13,7 +13,6 @@
 
 namespace Rekalogika\Mapper\Contracts;
 
-use Rekalogika\Mapper\Model\MixedType;
 use Symfony\Component\PropertyInfo\Type;
 
 class TypeMapping
diff --git a/src/MainTransformer.php b/src/MainTransformer.php
index aacb67b..75e32eb 100644
--- a/src/MainTransformer.php
+++ b/src/MainTransformer.php
@@ -16,12 +16,12 @@
 use Psr\Container\ContainerInterface;
 use Rekalogika\Mapper\Contracts\MainTransformerAwareInterface;
 use Rekalogika\Mapper\Contracts\MainTransformerInterface;
+use Rekalogika\Mapper\Contracts\MixedType;
 use Rekalogika\Mapper\Contracts\TransformerInterface;
 use Rekalogika\Mapper\Exception\LogicException;
 use Rekalogika\Mapper\Exception\UnableToFindSuitableTransformerException;
 use Rekalogika\Mapper\Mapping\MappingEntry;
 use Rekalogika\Mapper\Mapping\MappingFactoryInterface;
-use Rekalogika\Mapper\Model\MixedType;
 use Rekalogika\Mapper\ObjectCache\ObjectCache;
 use Rekalogika\Mapper\ObjectCache\ObjectCacheFactoryInterface;
 use Rekalogika\Mapper\TypeResolver\TypeResolverInterface;
diff --git a/src/Mapper.php b/src/Mapper.php
index 8a05f7f..5a77017 100644
--- a/src/Mapper.php
+++ b/src/Mapper.php
@@ -14,9 +14,9 @@
 namespace Rekalogika\Mapper;
 
 use Rekalogika\Mapper\Contracts\MainTransformerInterface;
+use Rekalogika\Mapper\Contracts\MixedType;
 use Rekalogika\Mapper\Exception\MapperReturnsUnexpectedValueException;
 use Rekalogika\Mapper\Exception\UnexpectedValueException;
-use Rekalogika\Mapper\Model\MixedType;
 use Rekalogika\Mapper\Util\TypeFactory;
 use Symfony\Component\PropertyInfo\Type;
 
diff --git a/src/Mapping/MappingFactory.php b/src/Mapping/MappingFactory.php
index 9318059..58e27e2 100644
--- a/src/Mapping/MappingFactory.php
+++ b/src/Mapping/MappingFactory.php
@@ -13,8 +13,8 @@
 
 namespace Rekalogika\Mapper\Mapping;
 
+use Rekalogika\Mapper\Contracts\MixedType;
 use Rekalogika\Mapper\Contracts\TransformerInterface;
-use Rekalogika\Mapper\Model\MixedType;
 use Rekalogika\Mapper\TypeResolver\TypeResolverInterface;
 use Symfony\Component\PropertyInfo\Type;
 
diff --git a/src/TypeResolver/CachingTypeResolver.php b/src/TypeResolver/CachingTypeResolver.php
index 67e1db6..b462d6d 100644
--- a/src/TypeResolver/CachingTypeResolver.php
+++ b/src/TypeResolver/CachingTypeResolver.php
@@ -13,7 +13,7 @@
 
 namespace Rekalogika\Mapper\TypeResolver;
 
-use Rekalogika\Mapper\Model\MixedType;
+use Rekalogika\Mapper\Contracts\MixedType;
 use Symfony\Component\PropertyInfo\Type;
 
 class CachingTypeResolver implements TypeResolverInterface
diff --git a/src/TypeResolver/TypeResolver.php b/src/TypeResolver/TypeResolver.php
index 03cece4..52eabd4 100644
--- a/src/TypeResolver/TypeResolver.php
+++ b/src/TypeResolver/TypeResolver.php
@@ -13,8 +13,8 @@
 
 namespace Rekalogika\Mapper\TypeResolver;
 
+use Rekalogika\Mapper\Contracts\MixedType;
 use Rekalogika\Mapper\Exception\InvalidArgumentException;
-use Rekalogika\Mapper\Model\MixedType;
 use Rekalogika\Mapper\Util\TypeFactory;
 use Rekalogika\Mapper\Util\TypeUtil;
 use Symfony\Component\PropertyInfo\Type;
diff --git a/src/TypeResolver/TypeResolverInterface.php b/src/TypeResolver/TypeResolverInterface.php
index 2695c51..89697eb 100644
--- a/src/TypeResolver/TypeResolverInterface.php
+++ b/src/TypeResolver/TypeResolverInterface.php
@@ -13,7 +13,7 @@
 
 namespace Rekalogika\Mapper\TypeResolver;
 
-use Rekalogika\Mapper\Model\MixedType;
+use Rekalogika\Mapper\Contracts\MixedType;
 use Symfony\Component\PropertyInfo\Type;
 
 interface TypeResolverInterface
diff --git a/src/Util/TypeCheck.php b/src/Util/TypeCheck.php
index a8bbaec..2210745 100644
--- a/src/Util/TypeCheck.php
+++ b/src/Util/TypeCheck.php
@@ -13,8 +13,8 @@
 
 namespace Rekalogika\Mapper\Util;
 
+use Rekalogika\Mapper\Contracts\MixedType;
 use Rekalogika\Mapper\Exception\LogicException;
-use Rekalogika\Mapper\Model\MixedType;
 use Symfony\Component\PropertyInfo\Type;
 
 class TypeCheck
diff --git a/src/Util/TypeFactory.php b/src/Util/TypeFactory.php
index ab06004..0d70f53 100644
--- a/src/Util/TypeFactory.php
+++ b/src/Util/TypeFactory.php
@@ -13,8 +13,8 @@
 
 namespace Rekalogika\Mapper\Util;
 
+use Rekalogika\Mapper\Contracts\MixedType;
 use Rekalogika\Mapper\Exception\InvalidArgumentException;
-use Rekalogika\Mapper\Model\MixedType;
 use Symfony\Component\PropertyInfo\Type;
 
 /**
diff --git a/src/Util/TypeUtil.php b/src/Util/TypeUtil.php
index 2d3da41..f7a3cd6 100644
--- a/src/Util/TypeUtil.php
+++ b/src/Util/TypeUtil.php
@@ -15,9 +15,9 @@
 
 use DaveLiddament\PhpLanguageExtensions\Friend;
 use DaveLiddament\PhpLanguageExtensions\NamespaceVisibility;
+use Rekalogika\Mapper\Contracts\MixedType;
 use Rekalogika\Mapper\Exception\InvalidArgumentException;
 use Rekalogika\Mapper\Exception\MapperReturnsUnexpectedValueException;
-use Rekalogika\Mapper\Model\MixedType;
 use Rekalogika\Mapper\Tests\UnitTest\Util\TypeUtil2Test;
 use Rekalogika\Mapper\Tests\UnitTest\Util\TypeUtilTest;
 use Rekalogika\Mapper\TypeResolver\TypeResolver;