diff --git a/app/models/post.rb b/app/models/post.rb
index 8dfe1e177..bbbd4cca5 100644
--- a/app/models/post.rb
+++ b/app/models/post.rb
@@ -50,7 +50,7 @@ class Post < ApplicationRecord
   has_many :approvals, :class_name => "PostApproval", :dependent => :destroy
   has_many :disapprovals, :class_name => "PostDisapproval", :dependent => :destroy
   has_many :favorites
-  has_many :replacements, class_name: "PostReplacement"
+  has_many :replacements, class_name: "PostReplacement", :dependent => :destroy
 
   if PostArchive.enabled?
     has_many :versions, lambda {order("post_versions.updated_at ASC")}, :class_name => "PostArchive", :dependent => :destroy