diff --git a/bitrise.yml b/bitrise.yml
index 69390c39ae6..b4af0773410 100644
--- a/bitrise.yml
+++ b/bitrise.yml
@@ -48,4 +48,4 @@ workflows:
 
 meta:
   bitrise.io:
-    stack: osx-xcode-16.0.x
+    stack: osx-xcode-16.3.x
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 3f60f35560e..d305f167903 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
@@ -140,7 +140,7 @@ private var credentialStore = SynchronizedDictionary<Int, URLCredential>()
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/modules/openapi-generator/src/main/resources/swift6/libraries/urlsession/URLSessionImplementations.mustache b/modules/openapi-generator/src/main/resources/swift6/libraries/urlsession/URLSessionImplementations.mustache
index af45cadbeb5..191545c3d70 100644
--- a/modules/openapi-generator/src/main/resources/swift6/libraries/urlsession/URLSessionImplementations.mustache
+++ b/modules/openapi-generator/src/main/resources/swift6/libraries/urlsession/URLSessionImplementations.mustache
@@ -140,7 +140,7 @@ fileprivate class URLSessionRequestBuilderConfiguration: @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
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 aa6558b927b..6f10c3cae31 100644
--- a/samples/client/petstore/swift5/asyncAwaitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/asyncAwaitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
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 aa6558b927b..6f10c3cae31 100644
--- a/samples/client/petstore/swift5/combineLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/combineLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
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 aa6558b927b..6f10c3cae31 100644
--- a/samples/client/petstore/swift5/default/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/default/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
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 aa6558b927b..6f10c3cae31 100644
--- a/samples/client/petstore/swift5/objcCompatible/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/objcCompatible/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
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 aa6558b927b..6f10c3cae31 100644
--- a/samples/client/petstore/swift5/oneOf/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/oneOf/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
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 aa6558b927b..6f10c3cae31 100644
--- a/samples/client/petstore/swift5/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
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 8d45a2bbb69..7525c158b9a 100644
--- a/samples/client/petstore/swift5/resultLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/resultLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ internal class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
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 aa6558b927b..6f10c3cae31 100644
--- a/samples/client/petstore/swift5/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift5/urlsessionLibrary/Sources/PetstoreClient/URLSessionImplementations.swift b/samples/client/petstore/swift5/urlsessionLibrary/Sources/PetstoreClient/URLSessionImplementations.swift
index aa6558b927b..6f10c3cae31 100644
--- a/samples/client/petstore/swift5/urlsessionLibrary/Sources/PetstoreClient/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/urlsessionLibrary/Sources/PetstoreClient/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift5/validation/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift b/samples/client/petstore/swift5/validation/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
index aa6558b927b..6f10c3cae31 100644
--- a/samples/client/petstore/swift5/validation/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift5/validation/PetstoreClient/Classes/OpenAPIs/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T> {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/asyncAwaitLibrary/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/combineDeferredLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/combineLibrary/Sources/CombineLibrary/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/default/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/objcCompatible/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/oneOf/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/promisekitLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
index d787d429b31..06b39a40120 100644
--- a/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/resultLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ internal class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendab
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/rxswiftLibrary/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/urlsessionLibrary/Sources/PetstoreClient/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")
diff --git a/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift b/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
index 802e927474b..93bcea293c6 100644
--- a/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
+++ b/samples/client/petstore/swift6/validation/PetstoreClient/Classes/OpenAPIs/Infrastructure/URLSessionImplementations.swift
@@ -140,7 +140,7 @@ open class URLSessionRequestBuilder<T>: RequestBuilder<T>, @unchecked Sendable {
                 encoding = FormDataEncoding(contentTypeForFormPart: contentTypeForFormPart(fileURL:))
             } else if contentType.hasPrefix("application/x-www-form-urlencoded") {
                 encoding = FormURLEncoding()
-            } else if contentType.hasPrefix("application/octet-stream"){
+            } else if contentType.hasPrefix("application/octet-stream") || contentType.hasPrefix("image/") {
                 encoding = OctetStreamEncoding()
             } else {
                 fatalError("Unsupported Media Type - \(contentType)")