diff --git a/app/services/api/v1/users/projects/list_service.rb b/app/services/api/v1/users/projects/list_service.rb
index 2e2716a21..dc406a955 100644
--- a/app/services/api/v1/users/projects/list_service.rb
+++ b/app/services/api/v1/users/projects/list_service.rb
@@ -55,13 +55,13 @@ class Api::V1::Users::Projects::ListService < ApplicationService
       projects = Project.from("( #{normal_projects} UNION #{org_projects} ) AS projects").distinct 
     when 'watched'
       projects = projects.where.not(user_id: observe_user.id).joins(:watchers).where(watchers: {watchable_type: "Project", user_id: observe_user.id})
-      projects = projects.joins(:watchers).where("watchers.created_at > ? and watchers.created_at < ?", start_at, end_at) if start_at.present? && end_at.present?
+      projects = projects.joins(:watchers).where("watchers.created_at > ? and watchers.created_at < ?", Time.at(start_at), Time.at(end_at)) if start_at.present? && end_at.present?
     when 'only_watched'
       projects = projects.where.joins(:watchers).where(watchers: {watchable_type: "Project", user_id: observe_user.id})
-      projects = projects.joins(:watchers).where("watchers.created_at > ? and watchers.created_at < ?", start_at, end_at) if start_at.present? && end_at.present?
+      projects = projects.joins(:watchers).where("watchers.created_at > ? and watchers.created_at < ?", Time.at(start_at), Time.at(end_at)) if start_at.present? && end_at.present?
     when 'forked'
       if start_at.present? && end_at.present?
-        fork_ids = observe_user.fork_users.where("created_at > ? and created_at < ?", start_at, end_at).select(:id, :fork_project_id).pluck(:fork_project_id)
+        fork_ids = observe_user.fork_users.where("created_at > ? and created_at < ?", Time.at(start_at), Time.at(end_at)).select(:id, :fork_project_id).pluck(:fork_project_id)
       else
         fork_ids = observe_user.fork_users.select(:id, :fork_project_id).pluck(:fork_project_id)
       end