diff --git a/db/migrate/20170711225116_fix_null_booleans.rb b/db/migrate/20170711225116_fix_null_booleans.rb
index 5b319471d..aabb81f21 100644
--- a/db/migrate/20170711225116_fix_null_booleans.rb
+++ b/db/migrate/20170711225116_fix_null_booleans.rb
@@ -1,17 +1,19 @@
 class FixNullBooleans < ActiveRecord::Migration[5.1]
   def change
-    change_column_default :domain_blocks, :reject_media, false
-    change_column_null :domain_blocks, :reject_media, false, false
+    safety_assured do
+      change_column_default :domain_blocks, :reject_media, false
+      change_column_null :domain_blocks, :reject_media, false, false
 
-    change_column_default :imports, :approved, false
-    change_column_null :imports, :approved, false, false
+      change_column_default :imports, :approved, false
+      change_column_null :imports, :approved, false, false
 
-    change_column_null :statuses, :sensitive, false, false
-    change_column_null :statuses, :reply, false, false
+      change_column_null :statuses, :sensitive, false, false
+      change_column_null :statuses, :reply, false, false
 
-    change_column_null :users, :admin, false, false
+      change_column_null :users, :admin, false, false
 
-    change_column_default :users, :otp_required_for_login, false
-    change_column_null :users, :otp_required_for_login, false, false
+      change_column_default :users, :otp_required_for_login, false
+      change_column_null :users, :otp_required_for_login, false, false
+    end
   end
 end
diff --git a/db/migrate/20171010025614_change_accounts_nonnullable_in_account_moderation_notes.rb b/db/migrate/20171010025614_change_accounts_nonnullable_in_account_moderation_notes.rb
index 747e5a826..1d7a0086c 100644
--- a/db/migrate/20171010025614_change_accounts_nonnullable_in_account_moderation_notes.rb
+++ b/db/migrate/20171010025614_change_accounts_nonnullable_in_account_moderation_notes.rb
@@ -1,6 +1,8 @@
 class ChangeAccountsNonnullableInAccountModerationNotes < ActiveRecord::Migration[5.1]
   def change
-    change_column_null :account_moderation_notes, :account_id, false
-    change_column_null :account_moderation_notes, :target_account_id, false
+    safety_assured do
+      change_column_null :account_moderation_notes, :account_id, false
+      change_column_null :account_moderation_notes, :target_account_id, false
+    end
   end
 end
diff --git a/db/migrate/20171201000000_change_account_id_nonnullable_in_lists.rb b/db/migrate/20171201000000_change_account_id_nonnullable_in_lists.rb
index 3369e3b9e..ac86c9e77 100644
--- a/db/migrate/20171201000000_change_account_id_nonnullable_in_lists.rb
+++ b/db/migrate/20171201000000_change_account_id_nonnullable_in_lists.rb
@@ -1,5 +1,7 @@
 class ChangeAccountIdNonnullableInLists < ActiveRecord::Migration[5.1]
   def change
-    change_column_null :lists, :account_id, false
+    safety_assured do
+      change_column_null :lists, :account_id, false
+    end
   end
 end
diff --git a/db/migrate/20180310000000_change_columns_in_notifications_nonnullable.rb b/db/migrate/20180310000000_change_columns_in_notifications_nonnullable.rb
index 05ffd0501..dba789207 100644
--- a/db/migrate/20180310000000_change_columns_in_notifications_nonnullable.rb
+++ b/db/migrate/20180310000000_change_columns_in_notifications_nonnullable.rb
@@ -1,8 +1,10 @@
 class ChangeColumnsInNotificationsNonnullable < ActiveRecord::Migration[5.1]
   def change
-    change_column_null :notifications, :activity_id, false
-    change_column_null :notifications, :activity_type, false
-    change_column_null :notifications, :account_id, false
-    change_column_null :notifications, :from_account_id, false
+    safety_assured do
+      change_column_null :notifications, :activity_id, false
+      change_column_null :notifications, :activity_type, false
+      change_column_null :notifications, :account_id, false
+      change_column_null :notifications, :from_account_id, false
+    end
   end
 end