diff --git a/database/migrations/2023_05_06_155517_alert_visits_table.php b/database/migrations/2023_05_06_155517_alert_visits_table.php
new file mode 100644
index 0000000..5c3d3a0
--- /dev/null
+++ b/database/migrations/2023_05_06_155517_alert_visits_table.php
@@ -0,0 +1,32 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('visits', function (Blueprint $table) {
+            $table->string('cda')->nullable();
+        });
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('visits', function (Blueprint $table) {
+            //
+        });
+    }
+};