diff --git a/samples/client/petstore/akka-scala/.swagger-codegen/VERSION b/samples/client/petstore/akka-scala/.swagger-codegen/VERSION
new file mode 100644
index 000000000000..7fea99011a6f
--- /dev/null
+++ b/samples/client/petstore/akka-scala/.swagger-codegen/VERSION
@@ -0,0 +1 @@
+2.2.3-SNAPSHOT
\ No newline at end of file
diff --git a/samples/client/petstore/akka-scala/src/main/scala/io/swagger/client/api/UserApi.scala b/samples/client/petstore/akka-scala/src/main/scala/io/swagger/client/api/UserApi.scala
index d1f95bdc18d1..95fa3aa58805 100644
--- a/samples/client/petstore/akka-scala/src/main/scala/io/swagger/client/api/UserApi.scala
+++ b/samples/client/petstore/akka-scala/src/main/scala/io/swagger/client/api/UserApi.scala
@@ -23,7 +23,7 @@ object UserApi {
   def createUser(body: User): ApiRequest[Unit] =
     ApiRequest[Unit](ApiMethods.POST, "http://petstore.swagger.io/v2", "/user", "application/json")
       .withBody(body)
-      .withSuccessResponse[Unit](0)
+      .withDefaultSuccessResponse[Unit]
         /**
    * 
    * Expected answers:
@@ -34,7 +34,7 @@ object UserApi {
   def createUsersWithArrayInput(body: Seq[User]): ApiRequest[Unit] =
     ApiRequest[Unit](ApiMethods.POST, "http://petstore.swagger.io/v2", "/user/createWithArray", "application/json")
       .withBody(body)
-      .withSuccessResponse[Unit](0)
+      .withDefaultSuccessResponse[Unit]
         /**
    * 
    * Expected answers:
@@ -45,7 +45,7 @@ object UserApi {
   def createUsersWithListInput(body: Seq[User]): ApiRequest[Unit] =
     ApiRequest[Unit](ApiMethods.POST, "http://petstore.swagger.io/v2", "/user/createWithList", "application/json")
       .withBody(body)
-      .withSuccessResponse[Unit](0)
+      .withDefaultSuccessResponse[Unit]
         /**
    * This can only be done by the logged in user.
    * 
@@ -105,7 +105,7 @@ object UserApi {
    */
   def logoutUser(): ApiRequest[Unit] =
     ApiRequest[Unit](ApiMethods.GET, "http://petstore.swagger.io/v2", "/user/logout", "application/json")
-      .withSuccessResponse[Unit](0)
+      .withDefaultSuccessResponse[Unit]
         /**
    * This can only be done by the logged in user.
    *