diff --git a/Swift/NetworkService.swift.twig b/Swift/NetworkService.swift.twig
index b0949bf..1668b23 100644
--- a/Swift/NetworkService.swift.twig
+++ b/Swift/NetworkService.swift.twig
@@ -11,7 +11,7 @@ class {{ serviceName }}: NetworkService {
         self.init(configuration: NetworkServiceConfiguration(baseUrl: {{ serviceName }}.apiBaseUrl))
     }
 
-    func apiRequest<T: Decodable>(with parameters: ApiRequestParameters, decoder: JSONDecoder = JSONDecoder()) -> Single<T> {
+    func apiRequest<T: Decodable>(with parameters: ApiRequestParameters, decoder: JSONDecoder) -> Single<T> {
         return rxRequest(with: parameters, decoder: decoder).map { $0.model }.asSingle()
     }
 
diff --git a/Swift/blocks/method/method-func.twig b/Swift/blocks/method/method-func.twig
index 444a52c..38bb1f9 100644
--- a/Swift/blocks/method/method-func.twig
+++ b/Swift/blocks/method/method-func.twig
@@ -13,12 +13,14 @@
     /// {{ method.description }}
     {{ isStatic ? "static " : "" }}func {{ funcName }}({%- if hasBody -%}{{ bodyParamName }}: {{ bodyTypeName }},{{ "\n                   " }}{%- endif -%}
                    requestEncoding: ParameterEncoding? = nil,
-                   requestHeaders: HTTPHeaders? = nil) -> Single<{{ method.responseType.type.typeName }}> {
+                   requestHeaders: HTTPHeaders? = nil,
+                   decoder: JSONDecoder = JSONDecoder()) -> Single<{{ method.responseType.type.typeName }}> {
 
         {% if isStatic -%}
           return shared.{{ funcName }}({%- if hasBody -%}{{ bodyParamName }}: {{ bodyParamName }},{{ "\n                   " }}{%- endif -%}
                    requestEncoding: requestEncoding,
-                   requestHeaders: requestHeaders)
+                   requestHeaders: requestHeaders,
+                   decoder: decoder)
         {%- else -%}
           let parameters = apiRequestParameters(relativeUrl: "{{ method.url }}",
                                               method: .{{ methodType }},
@@ -26,6 +28,6 @@
                                               requestEncoding: requestEncoding,
                                               requestHeaders: requestHeaders)
 
-          return apiRequest(with: parameters)
+          return apiRequest(with: parameters, decoder)
         {%- endif %}
-    }
\ No newline at end of file
+    }