diff --git a/app/models/deploy.rb b/app/models/deploy.rb
index 98e6d0a..907739f 100644
--- a/app/models/deploy.rb
+++ b/app/models/deploy.rb
@@ -9,7 +9,7 @@ require 'open3'
 # :attributes`.
 class Deploy < ApplicationRecord
   belongs_to :site
-  has_many :build_stats
+  has_many :build_stats, dependent: :destroy
 
   def deploy
     raise NotImplementedError
diff --git a/app/models/site.rb b/app/models/site.rb
index b053a6f..2d6e315 100644
--- a/app/models/site.rb
+++ b/app/models/site.rb
@@ -36,10 +36,10 @@ class Site < ApplicationRecord
   belongs_to :design
   belongs_to :licencia
 
-  has_many :log_entries
-  has_many :deploys
+  has_many :log_entries, dependent: :destroy
+  has_many :deploys, dependent: :destroy
   has_many :build_stats, through: :deploys
-  has_many :roles
+  has_many :roles, dependent: :destroy
   has_many :usuaries, -> { where('roles.rol = ?', 'usuarie') },
            through: :roles
   has_many :invitades, -> { where('roles.rol = ?', 'invitade') },