diff --git a/src/Api/FilterInterface.php b/src/Api/FilterInterface.php
index cb6936b14e8..9815b8b5fd0 100644
--- a/src/Api/FilterInterface.php
+++ b/src/Api/FilterInterface.php
@@ -28,6 +28,7 @@ interface FilterInterface
      *   - type: the type of the filter
      *   - required: if this filter is required
      *   - strategy: the used strategy
+     *   - is_collection (optional): is this filter is collection
      *   - swagger (optional): additional parameters for the path operation,
      *     e.g. 'swagger' => [
      *       'description' => 'My Description',
diff --git a/src/Bridge/Doctrine/Orm/Filter/SearchFilter.php b/src/Bridge/Doctrine/Orm/Filter/SearchFilter.php
index 772b749743f..264bd6943eb 100644
--- a/src/Bridge/Doctrine/Orm/Filter/SearchFilter.php
+++ b/src/Bridge/Doctrine/Orm/Filter/SearchFilter.php
@@ -112,6 +112,7 @@ public function getDescription(string $resourceClass): array
                         'type' => $typeOfField,
                         'required' => false,
                         'strategy' => $strategy,
+                        'is_collection' => '[]' === substr($filterParameterName, -2),
                     ];
                 }
             } elseif ($metadata->hasAssociation($field)) {
@@ -126,6 +127,7 @@ public function getDescription(string $resourceClass): array
                         'type' => 'string',
                         'required' => false,
                         'strategy' => self::STRATEGY_EXACT,
+                        'is_collection' => '[]' === substr($filterParameterName, -2),
                     ];
                 }
             }
diff --git a/src/Swagger/Serializer/DocumentationNormalizer.php b/src/Swagger/Serializer/DocumentationNormalizer.php
index 1c0e1001a04..2c1ab3b169b 100644
--- a/src/Swagger/Serializer/DocumentationNormalizer.php
+++ b/src/Swagger/Serializer/DocumentationNormalizer.php
@@ -608,7 +608,11 @@ private function getFiltersParameters(string $resourceClass, string $operationNa
                     'in' => 'query',
                     'required' => $data['required'],
                 ];
-                $parameter += $this->getType($data['type'], false, null, null, $definitions, $serializerContext);
+                $parameter += $this->getType($data['type'], $data['is_collection'] ?? false, null, null, $definitions, $serializerContext);
+
+                if ('array' === $parameter['type']) {
+                    $parameter['collectionFormat'] = \in_array($data['type'], [Type::BUILTIN_TYPE_ARRAY, Type::BUILTIN_TYPE_OBJECT], true) ? 'csv' : 'multi';
+                }
 
                 if (isset($data['swagger'])) {
                     $parameter = $data['swagger'] + $parameter;
diff --git a/tests/Bridge/Doctrine/Orm/Filter/SearchFilterTest.php b/tests/Bridge/Doctrine/Orm/Filter/SearchFilterTest.php
index 85c14d15bf6..bae5a9f0215 100644
--- a/tests/Bridge/Doctrine/Orm/Filter/SearchFilterTest.php
+++ b/tests/Bridge/Doctrine/Orm/Filter/SearchFilterTest.php
@@ -65,144 +65,168 @@ public function testGetDescription()
                 'type' => 'int',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'id[]' => [
                 'property' => 'id',
                 'type' => 'int',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'name' => [
                 'property' => 'name',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'name[]' => [
                 'property' => 'name',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'alias' => [
                 'property' => 'alias',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'alias[]' => [
                 'property' => 'alias',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'description' => [
                 'property' => 'description',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'description[]' => [
                 'property' => 'description',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'dummy' => [
                 'property' => 'dummy',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'dummy[]' => [
                 'property' => 'dummy',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'dummyDate' => [
                 'property' => 'dummyDate',
                 'type' => 'DateTimeInterface',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'dummyDate[]' => [
                 'property' => 'dummyDate',
                 'type' => 'DateTimeInterface',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'dummyFloat' => [
                 'property' => 'dummyFloat',
                 'type' => 'float',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'dummyFloat[]' => [
                 'property' => 'dummyFloat',
                 'type' => 'float',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'dummyPrice' => [
                 'property' => 'dummyPrice',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'dummyPrice[]' => [
                 'property' => 'dummyPrice',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'jsonData' => [
                 'property' => 'jsonData',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'jsonData[]' => [
                 'property' => 'jsonData',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'arrayData' => [
                 'property' => 'arrayData',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'arrayData[]' => [
                 'property' => 'arrayData',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'nameConverted' => [
                 'property' => 'nameConverted',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'nameConverted[]' => [
                 'property' => 'nameConverted',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'dummyBoolean' => [
                 'property' => 'dummyBoolean',
                 'type' => 'bool',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'dummyBoolean[]' => [
                 'property' => 'dummyBoolean',
                 'type' => 'bool',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
         ], $filter->getDescription($this->resourceClass));
 
@@ -226,120 +250,140 @@ public function testGetDescription()
                 'type' => 'int',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'id[]' => [
                 'property' => 'id',
                 'type' => 'int',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'name' => [
                 'property' => 'name',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'name[]' => [
                 'property' => 'name',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'alias' => [
                 'property' => 'alias',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'alias[]' => [
                 'property' => 'alias',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'dummy' => [
                 'property' => 'dummy',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'dummy[]' => [
                 'property' => 'dummy',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'dummyDate' => [
                 'property' => 'dummyDate',
                 'type' => 'DateTimeInterface',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'dummyDate[]' => [
                 'property' => 'dummyDate',
                 'type' => 'DateTimeInterface',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'jsonData' => [
                 'property' => 'jsonData',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'jsonData[]' => [
                 'property' => 'jsonData',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'arrayData' => [
                 'property' => 'arrayData',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'arrayData[]' => [
                 'property' => 'arrayData',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'nameConverted' => [
                 'property' => 'nameConverted',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'nameConverted[]' => [
                 'property' => 'nameConverted',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'relatedDummies.dummyDate' => [
                 'property' => 'relatedDummies.dummyDate',
                 'type' => 'DateTimeInterface',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'relatedDummies.dummyDate[]' => [
                 'property' => 'relatedDummies.dummyDate',
                 'type' => 'DateTimeInterface',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
             'relatedDummy' => [
                 'property' => 'relatedDummy',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => false,
             ],
             'relatedDummy[]' => [
                 'property' => 'relatedDummy',
                 'type' => 'string',
                 'required' => false,
                 'strategy' => 'exact',
+                'is_collection' => true,
             ],
         ], $filter->getDescription($this->resourceClass));
     }