diff --git a/app/models/event.rb b/app/models/event.rb
index 2af5cf381..73f9390b1 100644
--- a/app/models/event.rb
+++ b/app/models/event.rb
@@ -43,6 +43,9 @@ class Event < ActiveRecord::Base
 
   validates :title, :description, :url, blacklist: true
 
+  before_update :verify_lock_status
+  before_destroy :verify_lock_status
+
   # Duplicates
   include DuplicateChecking
   duplicate_checking_ignores_attributes    :source_id, :version, :venue_id
@@ -220,4 +223,8 @@ def end_time_later_than_start_time
       errors.add(:end_time, "cannot be before start")
     end
   end
+
+  def verify_lock_status
+    return false if locked
+  end
 end