diff --git a/db/migrate/20171125031751_add_invite_id_to_users.rb b/db/migrate/20171125031751_add_invite_id_to_users.rb
index 16829f866..9cfb0c542 100644
--- a/db/migrate/20171125031751_add_invite_id_to_users.rb
+++ b/db/migrate/20171125031751_add_invite_id_to_users.rb
@@ -1,5 +1,5 @@
 class AddInviteIdToUsers < ActiveRecord::Migration[5.1]
   def change
-    add_reference :users, :invite, null: true, default: nil, foreign_key: { on_delete: :nullify }, index: false
+    safety_assured { add_reference :users, :invite, null: true, default: nil, foreign_key: { on_delete: :nullify }, index: false }
   end
 end
diff --git a/db/migrate/20180402031200_add_assigned_account_id_to_reports.rb b/db/migrate/20180402031200_add_assigned_account_id_to_reports.rb
index 0456839c4..e2d1371d2 100644
--- a/db/migrate/20180402031200_add_assigned_account_id_to_reports.rb
+++ b/db/migrate/20180402031200_add_assigned_account_id_to_reports.rb
@@ -1,5 +1,5 @@
 class AddAssignedAccountIdToReports < ActiveRecord::Migration[5.1]
   def change
-    add_reference :reports, :assigned_account, null: true, default: nil, foreign_key: { on_delete: :nullify, to_table: :accounts }, index: false
+    safety_assured { add_reference :reports, :assigned_account, null: true, default: nil, foreign_key: { on_delete: :nullify, to_table: :accounts }, index: false }
   end
 end
diff --git a/db/migrate/20180510214435_add_access_token_id_to_web_push_subscriptions.rb b/db/migrate/20180510214435_add_access_token_id_to_web_push_subscriptions.rb
index 94ef8e0f5..f60716532 100644
--- a/db/migrate/20180510214435_add_access_token_id_to_web_push_subscriptions.rb
+++ b/db/migrate/20180510214435_add_access_token_id_to_web_push_subscriptions.rb
@@ -1,6 +1,8 @@
 class AddAccessTokenIdToWebPushSubscriptions < ActiveRecord::Migration[5.2]
   def change
-    add_reference :web_push_subscriptions, :access_token, null: true, default: nil, foreign_key: { on_delete: :cascade, to_table: :oauth_access_tokens }, index: false
-    add_reference :web_push_subscriptions, :user, null: true, default: nil, foreign_key: { on_delete: :cascade }, index: false
+    safety_assured do
+      add_reference :web_push_subscriptions, :access_token, null: true, default: nil, foreign_key: { on_delete: :cascade, to_table: :oauth_access_tokens }, index: false
+      add_reference :web_push_subscriptions, :user, null: true, default: nil, foreign_key: { on_delete: :cascade }, index: false
+    end
   end
 end
diff --git a/db/migrate/20181219235220_add_created_by_application_id_to_users.rb b/db/migrate/20181219235220_add_created_by_application_id_to_users.rb
index 17ce900af..81c9237e8 100644
--- a/db/migrate/20181219235220_add_created_by_application_id_to_users.rb
+++ b/db/migrate/20181219235220_add_created_by_application_id_to_users.rb
@@ -2,7 +2,7 @@ class AddCreatedByApplicationIdToUsers < ActiveRecord::Migration[5.2]
   disable_ddl_transaction!
 
   def change
-    add_reference :users, :created_by_application, foreign_key: { to_table: 'oauth_applications', on_delete: :nullify }, index: false
+    safety_assured { add_reference :users, :created_by_application, foreign_key: { to_table: 'oauth_applications', on_delete: :nullify }, index: false }
     add_index :users, :created_by_application_id, algorithm: :concurrently
   end
 end
diff --git a/db/migrate/20190103124754_add_scheduled_status_id_to_media_attachments.rb b/db/migrate/20190103124754_add_scheduled_status_id_to_media_attachments.rb
index 6f6cf2351..7d904af60 100644
--- a/db/migrate/20190103124754_add_scheduled_status_id_to_media_attachments.rb
+++ b/db/migrate/20190103124754_add_scheduled_status_id_to_media_attachments.rb
@@ -2,7 +2,7 @@ class AddScheduledStatusIdToMediaAttachments < ActiveRecord::Migration[5.2]
   disable_ddl_transaction!
 
   def change
-    add_reference :media_attachments, :scheduled_status, foreign_key: { on_delete: :nullify }, index: false
+    safety_assured { add_reference :media_attachments, :scheduled_status, foreign_key: { on_delete: :nullify }, index: false }
     add_index :media_attachments, :scheduled_status_id, algorithm: :concurrently
   end
 end
diff --git a/db/migrate/20200312185443_add_parent_id_to_email_domain_blocks.rb b/db/migrate/20200312185443_add_parent_id_to_email_domain_blocks.rb
index 03915040c..54ca3b87c 100644
--- a/db/migrate/20200312185443_add_parent_id_to_email_domain_blocks.rb
+++ b/db/migrate/20200312185443_add_parent_id_to_email_domain_blocks.rb
@@ -1,5 +1,5 @@
 class AddParentIdToEmailDomainBlocks < ActiveRecord::Migration[5.2]
   def change
-    add_reference :email_domain_blocks, :parent, null: true, default: nil, foreign_key: { on_delete: :cascade, to_table: :email_domain_blocks }, index: false
+    safety_assured { add_reference :email_domain_blocks, :parent, null: true, default: nil, foreign_key: { on_delete: :cascade, to_table: :email_domain_blocks }, index: false }
   end
 end