diff --git a/internal/db/migrations/013_cleanup_invalid_booleans.go b/internal/db/migrations/013_cleanup_invalid_booleans.go
new file mode 100644
index 0000000..bbde9e6
--- /dev/null
+++ b/internal/db/migrations/013_cleanup_invalid_booleans.go
@@ -0,0 +1,91 @@
+package migrations
+
+import (
+	"fmt"
+
+	"github.com/go-gormigrate/gormigrate/v2"
+	"gorm.io/gorm"
+)
+
+// CleanupInvalidBooleans updates boolean columns represented as integers
+// to ensure they only contain valid values (0, 1, or NULL).
+func CleanupInvalidBooleans() *gormigrate.Migration {
+	return &gormigrate.Migration{
+		ID: "013_cleanup_invalid_booleans",
+		Migrate: func(tx *gorm.DB) error {
+			fmt.Println("Running migration 013: Cleaning up invalid boolean values...")
+
+			// Target: transfer_configs.delete_after_transfer
+			// Set any non-NULL value that is not 0 or 1 to 0 (false)
+			sql := `UPDATE transfer_configs
+					SET delete_after_transfer = 0
+					WHERE delete_after_transfer IS NOT NULL AND delete_after_transfer NOT IN (0, 1);`
+
+			if err := tx.Exec(sql).Error; err != nil {
+				return fmt.Errorf("failed to cleanup delete_after_transfer in transfer_configs: %w", err)
+			}
+			fmt.Println("Cleaned up invalid values in transfer_configs.delete_after_transfer.")
+
+			// Target: transfer_configs.archive_enabled
+			sql = `UPDATE transfer_configs
+					SET archive_enabled = 0
+					WHERE archive_enabled IS NOT NULL AND archive_enabled NOT IN (0, 1);`
+			if err := tx.Exec(sql).Error; err != nil {
+				return fmt.Errorf("failed to cleanup archive_enabled in transfer_configs: %w", err)
+			}
+			fmt.Println("Cleaned up invalid values in transfer_configs.archive_enabled.")
+
+			// Target: transfer_configs.skip_processed_files
+			sql = `UPDATE transfer_configs
+					SET skip_processed_files = 0
+					WHERE skip_processed_files IS NOT NULL AND skip_processed_files NOT IN (0, 1);`
+			if err := tx.Exec(sql).Error; err != nil {
+				return fmt.Errorf("failed to cleanup skip_processed_files in transfer_configs: %w", err)
+			}
+			fmt.Println("Cleaned up invalid values in transfer_configs.skip_processed_files.")
+
+			// Target: notification_services.is_enabled
+			sql = `UPDATE notification_services
+					SET is_enabled = 0
+					WHERE is_enabled IS NOT NULL AND is_enabled NOT IN (0, 1);`
+			if err := tx.Exec(sql).Error; err != nil {
+				// Check if the table exists before failing hard
+				var tableExists int
+				tx.Raw("SELECT count(*) FROM sqlite_master WHERE type='table' AND name='notification_services'").Scan(&tableExists)
+				if tableExists == 0 {
+					fmt.Println("Skipping cleanup for notification_services.is_enabled: table does not exist.")
+				} else {
+					return fmt.Errorf("failed to cleanup is_enabled in notification_services: %w", err)
+				}
+			} else {
+				fmt.Println("Cleaned up invalid values in notification_services.is_enabled.")
+			}
+
+			// Target: auth_providers.enabled
+			sql = `UPDATE auth_providers
+					SET enabled = 0
+					WHERE enabled IS NOT NULL AND enabled NOT IN (0, 1);`
+			if err := tx.Exec(sql).Error; err != nil {
+				// Check if the table exists before failing hard
+				var tableExists int
+				tx.Raw("SELECT count(*) FROM sqlite_master WHERE type='table' AND name='auth_providers'").Scan(&tableExists)
+				if tableExists == 0 {
+					fmt.Println("Skipping cleanup for auth_providers.enabled: table does not exist.")
+				} else {
+					return fmt.Errorf("failed to cleanup enabled in auth_providers: %w", err)
+				}
+			} else {
+				fmt.Println("Cleaned up invalid values in auth_providers.enabled.")
+			}
+
+			fmt.Println("Migration 013 completed successfully.")
+			return nil
+		},
+		Rollback: func(tx *gorm.DB) error {
+			// This migration cleans up data. Rolling back doesn't make sense
+			// as we don't know the original invalid values.
+			fmt.Println("Rollback for migration 013_cleanup_invalid_booleans is not applicable.")
+			return nil
+		},
+	}
+}
diff --git a/internal/db/migrations/migrations.go b/internal/db/migrations/migrations.go
index 4bfbaa2..be953b6 100644
--- a/internal/db/migrations/migrations.go
+++ b/internal/db/migrations/migrations.go
@@ -23,6 +23,7 @@ func GetMigrations(db *gorm.DB) *gormigrate.Gormigrate {
 		AddRcloneCommandToConfig(),    // 010
 		AddAuthProviders(),            // 011
 		AlterBooleanDefaults(),        // 012
+		CleanupInvalidBooleans(),      // 013
 	)
 
 	return gormigrate.New(db, gormigrate.DefaultOptions, migrations)