diff --git a/modules/openapi-generator/src/main/resources/swift5/libraries/alamofire/AlamofireImplementations.mustache b/modules/openapi-generator/src/main/resources/swift5/libraries/alamofire/AlamofireImplementations.mustache
index 5ec281b054e..b716d254fa2 100644
--- a/modules/openapi-generator/src/main/resources/swift5/libraries/alamofire/AlamofireImplementations.mustache
+++ b/modules/openapi-generator/src/main/resources/swift5/libraries/alamofire/AlamofireImplementations.mustache
@@ -114,6 +114,8 @@ private var managerStore = SynchronizedDictionary<String, Alamofire.Session>()
                             mpForm.append(string.data(using: String.Encoding.utf8)!, withName: k)
                         case let number as NSNumber:
                             mpForm.append(number.stringValue.data(using: String.Encoding.utf8)!, withName: k)
+                        case let data as Data:
+                            mpForm.append(data, withName: k)
                         default:
                             fatalError("Unprocessable value \(v) with key \(k)")
                         }
diff --git a/modules/openapi-generator/src/main/resources/swift5/libraries/urlsession/URLSessionImplementations.mustache b/modules/openapi-generator/src/main/resources/swift5/libraries/urlsession/URLSessionImplementations.mustache
index eeae3c98aef..e235cd37200 100644
--- a/modules/openapi-generator/src/main/resources/swift5/libraries/urlsession/URLSessionImplementations.mustache
+++ b/modules/openapi-generator/src/main/resources/swift5/libraries/urlsession/URLSessionImplementations.mustache
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/alamofireLibrary/PetstoreClient/Classes/OpenAPIs/AlamofireImplementations.swift b/samples/client/petstore/swift5/alamofireLibrary/PetstoreClient/Classes/OpenAPIs/AlamofireImplementations.swift
index 577abc9a6ad..69945cad3fe 100644
--- a/samples/client/petstore/swift5/alamofireLibrary/PetstoreClient/Classes/OpenAPIs/AlamofireImplementations.swift
+++ b/samples/client/petstore/swift5/alamofireLibrary/PetstoreClient/Classes/OpenAPIs/AlamofireImplementations.swift
@@ -114,6 +114,8 @@ open class AlamofireRequestBuilder<T>: RequestBuilder<T> {
                             mpForm.append(string.data(using: String.Encoding.utf8)!, withName: k)
                         case let number as NSNumber:
                             mpForm.append(number.stringValue.data(using: String.Encoding.utf8)!, withName: k)
+                        case let data as Data:
+                            mpForm.append(data, withName: k)
                         default:
                             fatalError("Unprocessable value \(v) with key \(k)")
                         }
diff --git a/samples/client/petstore/swift5/asyncAwaitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/asyncAwaitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/asyncAwaitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/asyncAwaitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/combineLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/combineLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/combineLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/combineLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/default/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/default/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/default/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/default/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/deprecated/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/deprecated/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/deprecated/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/deprecated/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/frozenEnums/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/frozenEnums/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/frozenEnums/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/frozenEnums/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/nonPublicApi/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/nonPublicApi/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 929cbc5f04f..86beadcc71c 100644
--- a/samples/client/petstore/swift5/nonPublicApi/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/nonPublicApi/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/objcCompatible/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/objcCompatible/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/objcCompatible/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/objcCompatible/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/oneOf/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/oneOf/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/oneOf/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/oneOf/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/readonlyProperties/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/readonlyProperties/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/readonlyProperties/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/readonlyProperties/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/resultLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/resultLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/resultLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/resultLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/urlsessionLibrary/Sources/PetstoreClient/URLSessionImplementations.swift b/samples/client/petstore/swift5/urlsessionLibrary/Sources/PetstoreClient/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/urlsessionLibrary/Sources/PetstoreClient/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/urlsessionLibrary/Sources/PetstoreClient/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }
diff --git a/samples/client/petstore/swift5/x-swift-hashable/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/x-swift-hashable/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index 23df908ca32..ca22cb7e6e5 100644
--- a/samples/client/petstore/swift5/x-swift-hashable/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/x-swift-hashable/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -477,6 +477,15 @@ private class FormDataEncoding: ParameterEncoding {
                     )
                 }
 
+            case let data as Data:
+
+                urlRequest = configureDataUploadRequest(
+                    urlRequest: urlRequest,
+                    boundary: boundary,
+                    name: key,
+                    data: data
+                )
+
             default:
                 fatalError("Unprocessable value \(value) with key \(key)")
             }