diff --git a/public/openapi/read/config.yaml b/public/openapi/read/config.yaml
index 8643937eae..30455c6e61 100644
--- a/public/openapi/read/config.yaml
+++ b/public/openapi/read/config.yaml
@@ -41,6 +41,8 @@ get:
                 type: number
               minimumTagLength:
                 type: number
+              undoTimeout:
+                type: number
               maximumTagLength:
                 type: number
               useOutgoingLinksPage: