diff --git a/src/Command/AbstractCommand.php b/src/Command/AbstractCommand.php
index 2a04d05b3..b2036c2f2 100644
--- a/src/Command/AbstractCommand.php
+++ b/src/Command/AbstractCommand.php
@@ -11,6 +11,7 @@
 use Yiisoft\Db\Query\Data\DataReaderInterface;
 use Yiisoft\Db\Query\QueryInterface;
 use Yiisoft\Db\QueryBuilder\QueryBuilderInterface;
+use Yiisoft\Db\Schema\Builder\ColumnInterface;
 
 use function explode;
 use function get_resource_type;
@@ -188,7 +189,7 @@ public function addUnique(string $table, string $name, array|string $columns): s
         return $this->setSql($sql)->requireTableSchemaRefresh($table);
     }
 
-    public function alterColumn(string $table, string $column, string $type): static
+    public function alterColumn(string $table, string $column, string|ColumnInterface $type): static
     {
         $sql = $this->getQueryBuilder()->alterColumn($table, $column, $type);
         return $this->setSql($sql)->requireTableSchemaRefresh($table);
diff --git a/src/Command/CommandInterface.php b/src/Command/CommandInterface.php
index 55565f526..b7d9124e1 100644
--- a/src/Command/CommandInterface.php
+++ b/src/Command/CommandInterface.php
@@ -14,6 +14,7 @@
 use Yiisoft\Db\Exception\NotSupportedException;
 use Yiisoft\Db\Query\Data\DataReaderInterface;
 use Yiisoft\Db\Query\QueryInterface;
+use Yiisoft\Db\Schema\Builder\ColumnInterface;
 
 /**
  * This interface represents a database command, such as a `SELECT`, `INSERT`, `UPDATE`, or `DELETE` statement.
@@ -138,13 +139,13 @@ public function addPrimaryKey(string $table, string $name, array|string $columns
      *
      * @param string $table The table whose column is to change.
      * @param string $column The name of the column to change.
-     * @param string $type The column type. {@see QueryBuilder::getColumnType()} will be called to convert the give
-     * column type to the physical one. For example, `string` will be converted as `varchar(255)`, and `string not null`
-     * becomes `varchar(255) not null`.
+     * @param string|ColumnInterface $type The column type. {@see QueryBuilder::getColumnType()} will be called to
+     * convert the give column type to the physical one. For example, `string` will be converted as `varchar(255)`, and
+     * `string not null` becomes `varchar(255) not null`.
      *
      * Note: The method will quote the `table` and `column` parameters before using them in the generated SQL.
      */
-    public function alterColumn(string $table, string $column, string $type): static;
+    public function alterColumn(string $table, string $column, string|ColumnInterface $type): static;
 
     /**
      * Creates a batch INSERT command.