diff --git a/src/Models/Model.php b/src/Models/Model.php
index 4e37a847..b17d0793 100644
--- a/src/Models/Model.php
+++ b/src/Models/Model.php
@@ -973,11 +973,18 @@ protected function performInsert(): void
 
         $this->dispatch('creating');
 
+        // Some PHP versions prevent non-numerically indexed arrays
+        // from being sent to the server. To resolve this, we will
+        // convert the attributes to numerically indexed arrays.
+        $attributes = array_map('array_values', array_filter($this->getAttributes()));
+
         // Here we perform the insert of new object in the directory,
         // but filter out any empty attributes before sending them
         // to the server. LDAP servers will throw an exception if
         // attributes have been given empty or null values.
-        $this->dn = $query->insertAndGetDn($this->getDn(), array_filter($this->getAttributes()));
+        $this->dn = $query->insertAndGetDn($this->getDn(), $attributes);
+
+        $this->attributes = $attributes;
 
         $this->dispatch('created');
 
diff --git a/tests/Unit/Models/ModelTest.php b/tests/Unit/Models/ModelTest.php
index b8daaaa8..507a924c 100644
--- a/tests/Unit/Models/ModelTest.php
+++ b/tests/Unit/Models/ModelTest.php
@@ -783,6 +783,28 @@ public function test_generated_dns_properly_substitute_base_on_creation()
         $this->assertEquals('cn=foo,dc=local,dc=com', $model->getDn());
     }
 
+    public function test_attribute_values_are_numerically_indexed_on_create()
+    {
+        Container::addConnection(new Connection([
+            'base_dn' => 'dc=local,dc=com',
+        ]));
+
+        DirectoryFake::setup()->getLdapConnection()->expect(
+            LdapFake::operation('add')->once()->with(fn ($dn) => true, fn ($attributes) => (
+                collect($attributes)->every(fn ($values) => array_is_list($values))
+            ))->andReturnTrue(),
+        );
+
+        $model = new Entry;
+
+        $model->objectclass = ['bar'];
+        $model->cn = ['invalid' => 'John Doe'];
+
+        $model->save();
+
+        $this->assertEquals($model->cn, ['John Doe']);
+    }
+
     public function test_setting_dn_attributes_set_distinguished_name_on_model()
     {
         $this->assertEquals('foo', (new Entry(['distinguishedname' => 'foo']))->getDn());