diff --git a/change() b/change()
new file mode 100644
index 0000000000000000000000000000000000000000..e69de29bb2d1d6434b8b29ae775ad8c2e48c5391
diff --git a/database/migrations/2019_02_08_131515_ChangeType.php b/database/migrations/2019_02_08_131515_ChangeType.php
new file mode 100644
index 0000000000000000000000000000000000000000..3eb9162339bd726d4e36fed2a681e3ef7caeaa52
--- /dev/null
+++ b/database/migrations/2019_02_08_131515_ChangeType.php
@@ -0,0 +1,36 @@
+<?php
+
+use Illuminate\Support\Facades\Schema;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Database\Migrations\Migration;
+
+class ChangeType extends Migration
+{
+    /**
+     * Run the migrations.
+     *
+     * @return void
+     */
+    public function up()
+    {
+        Schema::table('seminar_topiks', function ($table) {
+			$table->string('schedule')->change();
+		});
+		
+		Schema::table('seminar_proposals', function ($table) {
+			$table->string('schedule')->change();
+		});
+    }
+
+    /**
+     * Reverse the migrations.
+     *
+     * @return void
+     */
+    public function down()
+    {
+        Schema::table('users', function (Blueprint $table) {
+            //
+        });
+    }
+}