diff --git a/api-ref/source/v3/attachments.inc b/api-ref/source/v3/attachments.inc
index fde3cc47065..97435dbd3c3 100644
--- a/api-ref/source/v3/attachments.inc
+++ b/api-ref/source/v3/attachments.inc
@@ -180,7 +180,7 @@ Creates an attachment.
 
 Available starting in the 3.27 microversion.
 
-Normal response codes: 202
+Normal response codes: 200
 
 Error response codes: badRequest(400), itemNotFound(404)
 
@@ -285,7 +285,7 @@ Complete an attachment for a cinder volume.
 
 Available starting in the 3.44 microversion.
 
-Normal response codes: 202
+Normal response codes: 204
 
 Error response codes: badRequest(400), itemNotFound(404)
 
diff --git a/cinder/api/v3/attachments.py b/cinder/api/v3/attachments.py
index 4d3bdbb1635..d807c933fc6 100644
--- a/cinder/api/v3/attachments.py
+++ b/cinder/api/v3/attachments.py
@@ -97,7 +97,7 @@ class AttachmentsController(wsgi.Controller):
                 sort_direction=sort_dirs)
 
     @wsgi.Controller.api_version(mv.NEW_ATTACH)
-    @wsgi.response(202)
+    @wsgi.response(200)
     @validation.schema(attachment.create)
     def create(self, req, body):
         """Create an attachment.
@@ -258,7 +258,7 @@ class AttachmentsController(wsgi.Controller):
         attachments = self.volume_api.attachment_delete(context, attachment)
         return attachment_views.ViewBuilder.list(attachments)
 
-    @wsgi.response(202)
+    @wsgi.response(204)
     @wsgi.Controller.api_version(mv.NEW_ATTACH_COMPLETION)
     @wsgi.action('os-complete')
     def complete(self, req, id, body):