diff --git a/codegenerator/openapi/cinder_schemas/volume.py b/codegenerator/openapi/cinder_schemas/volume.py
index b23daea..b2f102a 100644
--- a/codegenerator/openapi/cinder_schemas/volume.py
+++ b/codegenerator/openapi/cinder_schemas/volume.py
@@ -110,7 +110,7 @@ VOLUME_SCHEMA: dict[str, Any] = {
             "description": "The name of the availability zone.",
         },
         "bootable": {
-            "type": "boolean",
+            "type": "string",
             "description": "Enables or disables the bootable attribute. You can boot an instance from a bootable volume.",
         },
         "multiattach": {