diff --git a/src/Appwrite/SDK/Specification/Format/OpenAPI3.php b/src/Appwrite/SDK/Specification/Format/OpenAPI3.php
index 4bee70f848..ad384f0dd3 100644
--- a/src/Appwrite/SDK/Specification/Format/OpenAPI3.php
+++ b/src/Appwrite/SDK/Specification/Format/OpenAPI3.php
@@ -932,10 +932,11 @@ class OpenAPI3 extends Format
                 }
                 if ($items) {
                     if (!empty($rule['nestedModel']) && !$rule['array']) {
-                        unset($output['components']['schemas'][$model->getType()]['properties'][$name]['type']);
+                        $existing = $output['components']['schemas'][$model->getType()]['properties'][$name];
+                        unset($existing['type']);
                         $output['components']['schemas'][$model->getType()]['properties'][$name] = \array_merge(
-                            $output['components']['schemas'][$model->getType()]['properties'][$name],
-                            $items
+                            $existing,
+                            ['allOf' => [$items]]
                         );
                     } else {
                         $output['components']['schemas'][$model->getType()]['properties'][$name]['items'] = $items;
diff --git a/src/Appwrite/SDK/Specification/Format/Swagger2.php b/src/Appwrite/SDK/Specification/Format/Swagger2.php
index 0bce4df6c4..654f238dd2 100644
--- a/src/Appwrite/SDK/Specification/Format/Swagger2.php
+++ b/src/Appwrite/SDK/Specification/Format/Swagger2.php
@@ -925,10 +925,11 @@ class Swagger2 extends Format
                 }
                 if ($items) {
                     if (!empty($rule['nestedModel']) && !$rule['array']) {
-                        unset($output['definitions'][$model->getType()]['properties'][$name]['type']);
+                        $existing = $output['definitions'][$model->getType()]['properties'][$name];
+                        unset($existing['type']);
                         $output['definitions'][$model->getType()]['properties'][$name] = \array_merge(
-                            $output['definitions'][$model->getType()]['properties'][$name],
-                            $items
+                            $existing,
+                            ['allOf' => [$items]]
                         );
                     } else {
                         $output['definitions'][$model->getType()]['properties'][$name]['items'] = $items;