diff --git a/packages/nocodb/src/services/api-docs/swagger/getSwaggerColumnMetas.ts b/packages/nocodb/src/services/api-docs/swagger/getSwaggerColumnMetas.ts
index 7aaa525bd4..5301156182 100644
--- a/packages/nocodb/src/services/api-docs/swagger/getSwaggerColumnMetas.ts
+++ b/packages/nocodb/src/services/api-docs/swagger/getSwaggerColumnMetas.ts
@@ -52,6 +52,10 @@ export default async (
             $ref: `#/components/schemas/Attachment`,
           };
           break;
+        case UITypes.LastModifiedTime:
+        case UITypes.CreatedTime:
+          field.type = 'string';
+          break;
         default:
           field.virtual = false;
           SwaggerTypes.setSwaggerType(c, field, dbType);
diff --git a/packages/nocodb/src/services/api-docs/swaggerV2/getSwaggerColumnMetas.ts b/packages/nocodb/src/services/api-docs/swaggerV2/getSwaggerColumnMetas.ts
index 299e031c0f..f1a6c944e7 100644
--- a/packages/nocodb/src/services/api-docs/swaggerV2/getSwaggerColumnMetas.ts
+++ b/packages/nocodb/src/services/api-docs/swaggerV2/getSwaggerColumnMetas.ts
@@ -45,6 +45,10 @@ export default async (
             $ref: `#/components/schemas/Attachment`,
           };
           break;
+        case UITypes.LastModifiedTime:
+        case UITypes.CreatedTime:
+          field.type = 'string';
+          break;
         default:
           field.virtual = false;
           SwaggerTypes.setSwaggerType(c, field, dbType);