diff --git a/src/Oci8/Oci8Connection.php b/src/Oci8/Oci8Connection.php
index fcd3ada9..78fa3876 100644
--- a/src/Oci8/Oci8Connection.php
+++ b/src/Oci8/Oci8Connection.php
@@ -2,15 +2,12 @@
 
 namespace Yajra\Oci8;
 
-use Doctrine\DBAL\Driver\OCI8\Driver as DoctrineDriver;
-use Doctrine\DBAL\Version;
 use Illuminate\Database\Connection;
 use Illuminate\Database\Grammar;
 use Illuminate\Support\Str;
 use PDO;
 use PDOStatement;
 use Throwable;
-use Yajra\Oci8\PDO\Oci8Driver;
 use Yajra\Oci8\Query\Grammars\OracleGrammar as QueryGrammar;
 use Yajra\Oci8\Query\OracleBuilder as QueryBuilder;
 use Yajra\Oci8\Query\Processors\OracleProcessor as Processor;
@@ -187,16 +184,6 @@ public function setDateFormat($format = 'YYYY-MM-DD HH24:MI:SS')
         return $this->setSessionVars($sessionVars);
     }
 
-    /**
-     * Get doctrine driver.
-     *
-     * @return \Doctrine\DBAL\Driver\OCI8\Driver|\Yajra\Oci8\PDO\Oci8Driver
-     */
-    protected function getDoctrineDriver()
-    {
-        return class_exists(Version::class) ? new DoctrineDriver : new Oci8Driver();
-    }
-
     /**
      * Execute a PL/SQL Function and return its value.
      * Usage: DB::executeFunction('function_name', ['binding_1' => 'hi', 'binding_n' =>
diff --git a/src/Oci8/PDO/Oci8Driver.php b/src/Oci8/PDO/Oci8Driver.php
deleted file mode 100644
index 4e8d7d26..00000000
--- a/src/Oci8/PDO/Oci8Driver.php
+++ /dev/null
@@ -1,19 +0,0 @@
-<?php
-
-namespace Yajra\Oci8\PDO;
-
-use Doctrine\DBAL\Driver\AbstractOracleDriver;
-use Illuminate\Database\PDO\Concerns\ConnectsToDatabase;
-
-class Oci8Driver extends AbstractOracleDriver
-{
-    use ConnectsToDatabase;
-
-    /**
-     * {@inheritdoc}
-     */
-    public function getName()
-    {
-        return 'oci8';
-    }
-}
diff --git a/src/Oci8/Schema/Grammars/OracleGrammar.php b/src/Oci8/Schema/Grammars/OracleGrammar.php
index 38161b25..2757ca31 100644
--- a/src/Oci8/Schema/Grammars/OracleGrammar.php
+++ b/src/Oci8/Schema/Grammars/OracleGrammar.php
@@ -522,9 +522,9 @@ public function compileRenameColumn(Blueprint $blueprint, Fluent $command, Conne
         $table = $this->wrapTable($blueprint);
 
         $rs = [];
-        $rs[0] = 'alter table '.$table.' rename column '.$command->from.' to '.$command->to;
+        $rs[0] = 'alter table '.$table.' rename column '.$this->wrap($command->from).' to '.$this->wrap($command->to);
 
-        return (array) $rs;
+        return $rs;
     }
 
     /**
@@ -905,4 +905,55 @@ protected function wrapValue($value)
 
         return parent::wrapValue($value);
     }
+
+    /**
+     * Compile a change column command into a series of SQL statements.
+     *
+     * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
+     * @param  \Illuminate\Support\Fluent  $command
+     * @param  \Illuminate\Database\Connection  $connection
+     * @return array|string
+     *
+     * @throws \RuntimeException
+     */
+    public function compileChange(Blueprint $blueprint, Fluent $command, Connection $connection)
+    {
+        $columns = [];
+
+        foreach ($blueprint->getChangedColumns() as $column) {
+            $changes = [$this->getType($column).$this->modifyCollate($blueprint, $column)];
+
+            foreach ($this->modifiers as $modifier) {
+                if ($modifier === 'Collate') {
+                    continue;
+                }
+
+                if (method_exists($this, $method = "modify{$modifier}")) {
+                    $constraints = (array) $this->{$method}($blueprint, $column);
+
+                    foreach ($constraints as $constraint) {
+                        $changes[] = $constraint;
+                    }
+                }
+            }
+
+            $columns[] = 'modify '.$this->wrap($column).' '.implode(' ', array_filter(array_map('trim', $changes)));
+        }
+
+        return 'alter table '.$this->wrapTable($blueprint).' '.implode(' ', $columns);
+    }
+
+    /**
+     * Get the SQL for a collation column modifier.
+     *
+     * @param  \Illuminate\Database\Schema\Blueprint  $blueprint
+     * @param  \Illuminate\Support\Fluent  $column
+     * @return string|null
+     */
+    protected function modifyCollate(Blueprint $blueprint, Fluent $column)
+    {
+        if (! is_null($column->collation)) {
+            return ' collate '.$this->wrapValue($column->collation);
+        }
+    }
 }
diff --git a/tests/Database/Oci8SchemaGrammarTest.php b/tests/Database/Oci8SchemaGrammarTest.php
index 3da378db..98ce7c01 100644
--- a/tests/Database/Oci8SchemaGrammarTest.php
+++ b/tests/Database/Oci8SchemaGrammarTest.php
@@ -250,6 +250,74 @@ public function testBasicAlterTable()
             $statements[0]);
     }
 
+    public function testAlterTableRenameColumn()
+    {
+        $blueprint = new Blueprint('users');
+        $blueprint->renameColumn('email', 'email_address');
+
+        $conn = $this->getConnection();
+
+        $statements = $blueprint->toSql($conn, $this->getGrammar());
+
+        $this->assertCount(1, $statements);
+        $this->assertEquals('alter table "USERS" rename column "EMAIL" to "EMAIL_ADDRESS"', $statements[0]);
+    }
+
+    public function testAlterTableRenameMultipleColumns()
+    {
+        $blueprint = new Blueprint('users');
+        $blueprint->renameColumn('email', 'email_address');
+        $blueprint->renameColumn('address', 'address_1');
+
+        $conn = $this->getConnection();
+
+        $statements = $blueprint->toSql($conn, $this->getGrammar());
+
+        $this->assertCount(2, $statements);
+        $this->assertEquals('alter table "USERS" rename column "EMAIL" to "EMAIL_ADDRESS"', $statements[0]);
+        $this->assertEquals('alter table "USERS" rename column "ADDRESS" to "ADDRESS_1"', $statements[1]);
+    }
+
+    public function testAlterTableModifyColumn()
+    {
+        $blueprint = new Blueprint('users');
+        $blueprint->string('email')->change();
+
+        $conn = $this->getConnection();
+
+        $statements = $blueprint->toSql($conn, $this->getGrammar());
+
+        $this->assertCount(1, $statements);
+        $this->assertEquals('alter table "USERS" modify "EMAIL" varchar2(255) not null', $statements[0]);
+    }
+
+    public function testAlterTableModifyColumnWithCollate()
+    {
+        $blueprint = new Blueprint('users');
+        $blueprint->string('email')->change()->collation('latin1_swedish_ci');
+
+        $conn = $this->getConnection();
+
+        $statements = $blueprint->toSql($conn, $this->getGrammar());
+
+        $this->assertCount(1, $statements);
+        $this->assertEquals('alter table "USERS" modify "EMAIL" varchar2(255) collate "LATIN1_SWEDISH_CI" not null', $statements[0]);
+    }
+
+    public function testAlterTableModifyMultipleColumns()
+    {
+        $blueprint = new Blueprint('users');
+        $blueprint->string('email')->change();
+        $blueprint->string('name')->change();
+
+        $conn = $this->getConnection();
+
+        $statements = $blueprint->toSql($conn, $this->getGrammar());
+
+        $this->assertCount(1, $statements);
+        $this->assertEquals('alter table "USERS" modify "EMAIL" varchar2(255) not null modify "NAME" varchar2(255) not null', $statements[0]);
+    }
+
     public function testBasicAlterTableWithPrimary()
     {
         $blueprint = new Blueprint('users');