diff --git a/app/models/task_request.rb b/app/models/task_request.rb
index 458e86a..7f43e18 100644
--- a/app/models/task_request.rb
+++ b/app/models/task_request.rb
@@ -5,4 +5,6 @@ class TaskRequest < ApplicationRecord
   enum status: [:pending, :completed, :cancelled]
 
   scope :order_by_recent, -> { order(created_at: :desc) }
+
+  validates :time_allowed, numericality: { only_integer: true, greater_than_or_equal_to: 2 }, allow_blank: true
 end