diff --git a/CHANGELOG.md b/CHANGELOG.md
index f0296ba..77e03b5 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -4,13 +4,14 @@
 
 * feat: `PresetTransformer`.
 * fix: Typo in `RemoveOptionalDefinitionPass`
-* feat: Supports dynamic properties (including `stdClass`) on the target side.
+* feat: Supports dynamic properties (including `stdClass`) on the source side.
 * fix(`Mapper`): Fix typehint.
 * test: test array cast to object mapping
 * feat(`Context`): `with()` not accepts multiple argument.
 * build: Deinternalize `ObjectCacheFactory`
 * fix(`PresetMapping`): Support proxied classes, add tests.
 * fix: Disallow proxy for objects with dynamic properties, including `stdClass`.
+* feat: Dynamic properties (`stdClass` & co) on the target side.
 
 ## 1.0.0
 
diff --git a/src/Transformer/Implementation/ObjectToObjectTransformer.php b/src/Transformer/Implementation/ObjectToObjectTransformer.php
index 78b7d85..22f931f 100644
--- a/src/Transformer/Implementation/ObjectToObjectTransformer.php
+++ b/src/Transformer/Implementation/ObjectToObjectTransformer.php
@@ -377,9 +377,10 @@ private function readSourcePropertyAndWriteTargetProperty(
         $targetWriteVisibility = $propertyMapping->getTargetWriteVisibility();
 
         if (
-            $targetWriteMode !== WriteMode::Method
-            && $targetWriteMode !== WriteMode::Property
-            && $targetWriteMode !== WriteMode::AdderRemover
+            in_array($targetWriteMode, [
+                WriteMode::None,
+                WriteMode::Constructor,
+            ], true)
         ) {
             return;
         }
diff --git a/src/Transformer/ObjectToObjectMetadata/Implementation/ObjectToObjectMetadataFactory.php b/src/Transformer/ObjectToObjectMetadata/Implementation/ObjectToObjectMetadataFactory.php
index 6aeded2..071d430 100644
--- a/src/Transformer/ObjectToObjectMetadata/Implementation/ObjectToObjectMetadataFactory.php
+++ b/src/Transformer/ObjectToObjectMetadata/Implementation/ObjectToObjectMetadataFactory.php
@@ -90,7 +90,7 @@ public function createObjectToObjectMetadata(
             throw new InternalClassUnsupportedException($sourceClass);
         }
 
-        if ($targetReflection->isInternal()) {
+        if (!$targetAllowsDynamicProperties && $targetReflection->isInternal()) {
             throw new InternalClassUnsupportedException($targetClass);
         }
 
@@ -126,7 +126,18 @@ public function createObjectToObjectMetadata(
 
         $propertyMappings = [];
 
-        foreach ($targetProperties as $targetProperty) {
+        // determine properties to map
+
+        if ($targetAllowsDynamicProperties) {
+            $sourceProperties = $this->listProperties($sourceClass);
+            $propertiesToMap = array_unique(array_merge($sourceProperties, $targetProperties));
+        } else {
+            $propertiesToMap = $targetProperties;
+        }
+
+        // iterate over properties to map
+
+        foreach ($propertiesToMap as $targetProperty) {
             $sourceProperty = $targetProperty;
 
             // determine if a property mapper is defined for the property
@@ -176,9 +187,16 @@ public function createObjectToObjectMetadata(
             // process target read mode
 
             if ($targetReadInfo === null) {
-                $targetReadMode = ReadMode::None;
-                $targetReadName = null;
-                $targetReadVisibility = Visibility::None;
+                // if source allows dynamic properties, including stdClass
+                if ($targetAllowsDynamicProperties) {
+                    $targetReadMode = ReadMode::DynamicProperty;
+                    $targetReadName = $targetProperty;
+                    $targetReadVisibility = Visibility::Public;
+                } else {
+                    $targetReadMode = ReadMode::None;
+                    $targetReadName = null;
+                    $targetReadVisibility = Visibility::None;
+                }
             } else {
                 $targetReadMode = match ($targetReadInfo->getType()) {
                     PropertyReadInfo::TYPE_METHOD => ReadMode::Method,
@@ -223,15 +241,22 @@ public function createObjectToObjectMetadata(
                 };
 
                 if ($targetWriteMode === WriteMode::None) {
-                    continue;
+                    if (!$targetAllowsDynamicProperties) {
+                        continue;
+                    }
+                    $targetWriteMode = WriteMode::DynamicProperty;
+                    $targetWriteName = $targetProperty;
+                    $targetWriteVisibility = Visibility::Public;
+
+                } else {
+                    $targetWriteName = $targetWriteInfo->getName();
+                    $targetWriteVisibility = match ($targetWriteInfo->getVisibility()) {
+                        PropertyWriteInfo::VISIBILITY_PUBLIC => Visibility::Public,
+                        PropertyWriteInfo::VISIBILITY_PROTECTED => Visibility::Protected,
+                        PropertyWriteInfo::VISIBILITY_PRIVATE => Visibility::Private,
+                        default => Visibility::None,
+                    };
                 }
-                $targetWriteName = $targetWriteInfo->getName();
-                $targetWriteVisibility = match ($targetWriteInfo->getVisibility()) {
-                    PropertyWriteInfo::VISIBILITY_PUBLIC => Visibility::Public,
-                    PropertyWriteInfo::VISIBILITY_PROTECTED => Visibility::Protected,
-                    PropertyWriteInfo::VISIBILITY_PRIVATE => Visibility::Private,
-                    default => Visibility::None,
-                };
             }
 
             // get source property types
diff --git a/src/Transformer/ObjectToObjectMetadata/WriteMode.php b/src/Transformer/ObjectToObjectMetadata/WriteMode.php
index 646b91c..5f24ce5 100644
--- a/src/Transformer/ObjectToObjectMetadata/WriteMode.php
+++ b/src/Transformer/ObjectToObjectMetadata/WriteMode.php
@@ -23,4 +23,5 @@ enum WriteMode
     case Property;
     case AdderRemover;
     case Constructor;
+    case DynamicProperty;
 }
diff --git a/src/Transformer/Util/ReaderWriter.php b/src/Transformer/Util/ReaderWriter.php
index 6d2c766..faaa429 100644
--- a/src/Transformer/Util/ReaderWriter.php
+++ b/src/Transformer/Util/ReaderWriter.php
@@ -64,9 +64,10 @@ public function readSourceProperty(
                 if (isset($source->{$accessorName})) {
                     return $source->{$accessorName};
                 }
-                return null;
 
+                return null;
             }
+
             return null;
         } catch (\Error $e) {
             $message = $e->getMessage();
@@ -119,7 +120,14 @@ public function readTargetProperty(
             } elseif ($readMode === ReadMode::Method) {
                 /** @psalm-suppress MixedMethodCall */
                 return $target->{$accessorName}();
+            } elseif ($readMode === ReadMode::DynamicProperty) {
+                if (isset($target->{$accessorName})) {
+                    return $target->{$accessorName};
+                }
+
+                return null;
             }
+
             return null;
         } catch (\Error $e) {
             $message = $e->getMessage();
@@ -164,6 +172,8 @@ public function writeTargetProperty(
                 $target->{$accessorName}($value);
             } elseif ($writeMode === WriteMode::AdderRemover) {
                 // noop
+            } elseif ($writeMode === WriteMode::DynamicProperty) {
+                $target->{$accessorName} = $value;
             }
         } catch (\Throwable $e) {
             throw new UnableToWriteException(
diff --git a/tests/IntegrationTest/DynamicPropertyTest.php b/tests/IntegrationTest/DynamicPropertyTest.php
index 6085de7..a65b388 100644
--- a/tests/IntegrationTest/DynamicPropertyTest.php
+++ b/tests/IntegrationTest/DynamicPropertyTest.php
@@ -15,10 +15,13 @@
 
 use Rekalogika\Mapper\Tests\Common\FrameworkTestCase;
 use Rekalogika\Mapper\Tests\Fixtures\DynamicProperty\ObjectExtendingStdClass;
+use Rekalogika\Mapper\Tests\Fixtures\Scalar\ObjectWithScalarProperties;
 use Rekalogika\Mapper\Tests\Fixtures\ScalarDto\ObjectWithScalarPropertiesDto;
 
 class DynamicPropertyTest extends FrameworkTestCase
 {
+    // from stdclass to object
+
     public function testStdClassToObject(): void
     {
         $source = new \stdClass();
@@ -86,4 +89,55 @@ public function testStdClassWithoutPropertiesToObject(): void
         $this->assertNull($target->c);
         $this->assertNull($target->d);
     }
+
+    // to stdClass
+
+    public function testObjectToStdClass(): void
+    {
+        $source = new ObjectWithScalarProperties();
+        $target = $this->mapper->map($source, \stdClass::class);
+
+        $this->assertInstanceOf(\stdClass::class, $target);
+
+        $this->assertSame(1, $target->a);
+        $this->assertSame('string', $target->b);
+        $this->assertTrue($target->c);
+        $this->assertSame(1.1, $target->d);
+    }
+
+    public function testObjectToObjectExtendingStdClass(): void
+    {
+        $source = new ObjectWithScalarProperties();
+        $target = $this->mapper->map($source, ObjectExtendingStdClass::class);
+
+        $this->assertInstanceOf(ObjectExtendingStdClass::class, $target);
+
+        /** @psalm-suppress UndefinedPropertyFetch */
+        $this->assertSame(1, $target->a);
+        /** @psalm-suppress UndefinedPropertyFetch */
+        $this->assertSame('string', $target->b);
+        /** @psalm-suppress UndefinedPropertyFetch */
+        $this->assertTrue($target->c);
+        /** @psalm-suppress UndefinedPropertyFetch */
+        $this->assertSame(1.1, $target->d);
+    }
+
+    // stdclass to stdclass
+
+    public function testStdClassToStdClass(): void
+    {
+        $source = new \stdClass();
+        $source->a = 1;
+        $source->b = 'string';
+        $source->c = true;
+        $source->d = 1.1;
+
+        $target = $this->mapper->map($source, \stdClass::class);
+
+        $this->assertInstanceOf(\stdClass::class, $target);
+        $this->assertSame(1, $target->a);
+        $this->assertSame('string', $target->b);
+        $this->assertTrue($target->c);
+        $this->assertSame(1.1, $target->d);
+    }
 }