diff --git a/src/search/SearchEngine.ts b/src/search/SearchEngine.ts
index e0d70da..957e196 100644
--- a/src/search/SearchEngine.ts
+++ b/src/search/SearchEngine.ts
@@ -179,7 +179,8 @@ class SearchEngine {
 
       this.searchIndexes[doctype] = {
         index,
-        lastSeq: info?.update_seq
+        lastSeq: info?.update_seq,
+        lastUpdated: new Date().toISOString()
       }
       return this.searchIndexes[doctype]
     }
@@ -204,6 +205,7 @@ class SearchEngine {
     }
 
     searchIndex.lastSeq = changes.last_seq
+    searchIndex.lastUpdated = new Date().toISOString()
     return searchIndex
   }
 
diff --git a/src/search/types.ts b/src/search/types.ts
index 4bcf3cd..83fb8e5 100644
--- a/src/search/types.ts
+++ b/src/search/types.ts
@@ -47,7 +47,8 @@ export interface SearchResult {
 
 export interface SearchIndex {
   index: FlexSearch.Document<CozyDoc, true>
-  lastSeq: number
+  lastSeq: number | null
+  lastUpdated: string
 }
 
 export type SearchIndexes = {