diff --git a/app/views/ci/pipelines/_list.json.jbuilder b/app/views/ci/pipelines/_list.json.jbuilder
index aab9ce142..6e091bf28 100644
--- a/app/views/ci/pipelines/_list.json.jbuilder
+++ b/app/views/ci/pipelines/_list.json.jbuilder
@@ -2,8 +2,5 @@ json.id pipeline.id
 json.pipeline_name pipeline.pipeline_name
 json.pipeline_status pipeline.pipeline_status
 json.file_name pipeline.file_name
-json.created_at pipeline.created_at
-json.updated_at pipeline.updated_at
-json.stages pipeline.pipeline_stages do |pipeline_stage|
-  json.partial! "/ci/pipeline_stages/list", pipeline_stage: pipeline_stage
-end
+json.created_at pipeline.created_at.strftime("%Y-%m-%d %H:%M:%S")
+json.updated_at pipeline.updated_at.strftime("%Y-%m-%d %H:%M:%S")