diff --git a/db/migrate/20230726062428_add_template_fields_to_submission.rb b/db/migrate/20230726062428_add_template_fields_to_submission.rb
index 456c5e16..9ae50aa8 100644
--- a/db/migrate/20230726062428_add_template_fields_to_submission.rb
+++ b/db/migrate/20230726062428_add_template_fields_to_submission.rb
@@ -10,9 +10,11 @@ class AddTemplateFieldsToSubmission < ActiveRecord::Migration[7.0]
   end
 
   def up
-    add_column :submissions, :template_fields, :text
-    add_column :submissions, :template_schema, :text
-    add_column :submissions, :template_submitters, :text
+    change_table :submissions, bulk: true do |t|
+      t.text :template_fields
+      t.text :template_schema
+      t.text :template_submitters
+    end
 
     MigrationTemplate.all.each do |template|
       MigrationSubmission.where(template_id: template.id).each do |submission|
@@ -24,8 +26,10 @@ class AddTemplateFieldsToSubmission < ActiveRecord::Migration[7.0]
   end
 
   def down
-    remove_column :submissions, :template_fields
-    remove_column :submissions, :template_schema
-    remove_column :submissions, :template_submitters
+    change_table :submissions, bulk: true do |t|
+      t.remove :template_fields
+      t.remove :template_schema
+      t.remove :template_submitters
+    end
   end
 end
diff --git a/db/migrate/20230819113427_remove_user_first_last_name_not_null.rb b/db/migrate/20230819113427_remove_user_first_last_name_not_null.rb
index a848a69f..5e4348fb 100644
--- a/db/migrate/20230819113427_remove_user_first_last_name_not_null.rb
+++ b/db/migrate/20230819113427_remove_user_first_last_name_not_null.rb
@@ -2,7 +2,9 @@
 
 class RemoveUserFirstLastNameNotNull < ActiveRecord::Migration[7.0]
   def change
-    change_column_null :users, :first_name, true
-    change_column_null :users, :last_name, true
+    change_table :users, bulk: true do |t|
+      t.change_null :first_name, true
+      t.change_null :last_name, true
+    end
   end
 end
diff --git a/db/migrate/20230902171216_add_phone_and_name_to_submitters.rb b/db/migrate/20230902171216_add_phone_and_name_to_submitters.rb
index 60a14000..9421918e 100644
--- a/db/migrate/20230902171216_add_phone_and_name_to_submitters.rb
+++ b/db/migrate/20230902171216_add_phone_and_name_to_submitters.rb
@@ -2,9 +2,10 @@
 
 class AddPhoneAndNameToSubmitters < ActiveRecord::Migration[7.0]
   def change
-    add_column :submitters, :name, :string
-    add_column :submitters, :phone, :string
-
-    change_column_null :submitters, :email, true
+    change_table :submitters, bulk: true do |t|
+      t.string :name
+      t.string :phone
+      t.change_null :email, true
+    end
   end
 end
diff --git a/db/migrate/20230915200635_add_devise_two_factor_to_users.rb b/db/migrate/20230915200635_add_devise_two_factor_to_users.rb
index b041dc43..f22f28be 100644
--- a/db/migrate/20230915200635_add_devise_two_factor_to_users.rb
+++ b/db/migrate/20230915200635_add_devise_two_factor_to_users.rb
@@ -2,8 +2,10 @@
 
 class AddDeviseTwoFactorToUsers < ActiveRecord::Migration[7.0]
   def change
-    add_column :users, :otp_secret, :string
-    add_column :users, :consumed_timestep, :integer
-    add_column :users, :otp_required_for_login, :boolean, default: false, null: false
+    change_table :users, bulk: true do |t|
+      t.string :otp_secret
+      t.integer :consumed_timestep
+      t.boolean :otp_required_for_login, default: false, null: false
+    end
   end
 end
diff --git a/db/migrate/20250523121121_add_shared_link_to_templates.rb b/db/migrate/20250523121121_add_shared_link_to_templates.rb
index 6fe962eb..27e7cccb 100644
--- a/db/migrate/20250523121121_add_shared_link_to_templates.rb
+++ b/db/migrate/20250523121121_add_shared_link_to_templates.rb
@@ -8,12 +8,14 @@ class AddSharedLinkToTemplates < ActiveRecord::Migration[8.0]
   end
 
   def up
-    add_column :templates, :shared_link, :boolean, if_not_exists: true
+    add_column :templates, :shared_link, :boolean, default: false, null: false, if_not_exists: true
 
     MigrationTemplate.where(shared_link: nil).in_batches.update_all(shared_link: true)
 
-    change_column_default :templates, :shared_link, from: nil, to: false
-    change_column_null :templates, :shared_link, false
+    change_table :templates, bulk: true do |t|
+      t.change_default :shared_link, from: nil, to: false
+      t.change_null :shared_link, false
+    end
   end
 
   def down