diff --git a/app/controllers/projects_controller.rb b/app/controllers/projects_controller.rb
index 0ece8f227..7cf068cd5 100644
--- a/app/controllers/projects_controller.rb
+++ b/app/controllers/projects_controller.rb
@@ -287,7 +287,10 @@ class ProjectsController < ApplicationController
   end
 
   def watch_users
+    start_at = params[:start_at]
+    end_at = params[:end_at]
     watchers = @project.watchers.includes(:user).order("watchers.created_at desc").distinct
+    watchers = watchers.where("watchers.created_at > ? and watchers.created_at < ?", Time.at(start_at), Time.at(end_at)) if start_at.present? && end_at.present?
     @watchers_count = watchers.size
     @watchers = paginate(watchers)
   end