diff --git a/invokeai/frontend/web/src/common/util/getTimestamp.ts b/invokeai/frontend/web/src/common/util/getTimestamp.ts
index 570283fa8f..daa9f8dc33 100644
--- a/invokeai/frontend/web/src/common/util/getTimestamp.ts
+++ b/invokeai/frontend/web/src/common/util/getTimestamp.ts
@@ -3,4 +3,5 @@ import dateFormat from 'dateformat';
 /**
  * Get a `now` timestamp with 1s precision, formatted as ISO datetime.
  */
-export const getTimestamp = () => dateFormat(new Date(), 'isoDateTime');
+export const getTimestamp = () =>
+  dateFormat(new Date(), `yyyy-mm-dd'T'HH:MM:ss:lo`);