diff --git a/Model/ModelRegistry.php b/Model/ModelRegistry.php
index 7cc20f8..02cb4c2 100644
--- a/Model/ModelRegistry.php
+++ b/Model/ModelRegistry.php
@@ -126,8 +126,8 @@ final class ModelRegistry
 
     private function getTypeShortName(Type $type): string
     {
-        if (null !== $type->getCollectionValueType()) {
-            return $this->getTypeShortName($type->getCollectionValueType()).'[]';
+        if (null !== $collectionType = $this->getCollectionValueType($type)) {
+            return $this->getTypeShortName($collectionType).'[]';
         }
 
         if (Type::BUILTIN_TYPE_OBJECT === $type->getBuiltinType()) {
@@ -144,8 +144,8 @@ final class ModelRegistry
         if (Type::BUILTIN_TYPE_OBJECT === $type->getBuiltinType()) {
             return $type->getClassName();
         } elseif ($type->isCollection()) {
-            if (null !== $type->getCollectionValueType()) {
-                return $this->typeToString($type->getCollectionValueType()).'[]';
+            if (null !== $collectionType = $this->getCollectionValueType($type)) {
+                return $this->typeToString($collectionType).'[]';
             } else {
                 return 'mixed[]';
             }
@@ -153,4 +153,14 @@ final class ModelRegistry
             return $type->getBuiltinType();
         }
     }
+
+    private function getCollectionValueType(Type $type): ?Type
+    {
+        // BC layer, this condition should be removed after removing support for symfony < 5.3
+        if (!method_exists($type, 'getCollectionValueTypes')) {
+            return $type->getCollectionValueType();
+        }
+
+        return $type->getCollectionValueTypes()[0] ?? null;
+    }
 }
diff --git a/PropertyDescriber/ArrayPropertyDescriber.php b/PropertyDescriber/ArrayPropertyDescriber.php
index defb84f..89b50f4 100644
--- a/PropertyDescriber/ArrayPropertyDescriber.php
+++ b/PropertyDescriber/ArrayPropertyDescriber.php
@@ -31,7 +31,10 @@ class ArrayPropertyDescriber implements PropertyDescriberInterface, ModelRegistr
 
     public function describe(Type $type, Schema $property, array $groups = null)
     {
-        $type = $type->getCollectionValueType();
+        // BC layer for symfony < 5.3
+        $type = method_exists($type, 'getCollectionValueTypes') ?
+            ($type->getCollectionValueTypes()[0] ?? null) :
+            $type->getCollectionValueType();
         if (null === $type) {
             throw new UndocumentedArrayItemsException();
         }
diff --git a/PropertyDescriber/ObjectPropertyDescriber.php b/PropertyDescriber/ObjectPropertyDescriber.php
index cc9619e..27ca76f 100644
--- a/PropertyDescriber/ObjectPropertyDescriber.php
+++ b/PropertyDescriber/ObjectPropertyDescriber.php
@@ -23,7 +23,19 @@ class ObjectPropertyDescriber implements PropertyDescriberInterface, ModelRegist
 
     public function describe(Type $type, Schema $property, array $groups = null)
     {
-        $type = new Type($type->getBuiltinType(), false, $type->getClassName(), $type->isCollection(), $type->getCollectionKeyType(), $type->getCollectionValueType()); // ignore nullable field
+        $type = new Type(
+            $type->getBuiltinType(),
+            false,
+            $type->getClassName(),
+            $type->isCollection(),
+            method_exists($type, 'getCollectionKeyTypes') ?
+                ($type->getCollectionKeyTypes()[0] ?? null) :
+                $type->getCollectionKeyType(),
+            // BC layer for symfony < 5.3
+            method_exists($type, 'getCollectionValueTypes') ?
+                ($type->getCollectionValueTypes()[0] ?? null) :
+                $type->getCollectionValueType()
+        ); // ignore nullable field
 
         $property->setRef(
             $this->modelRegistry->register(new Model($type, $groups))