diff --git a/web/apps/cast/src/services/cast.ts b/web/apps/cast/src/services/cast.ts
index 6d1a6f36a..8ead8962a 100644
--- a/web/apps/cast/src/services/cast.ts
+++ b/web/apps/cast/src/services/cast.ts
@@ -183,9 +183,9 @@ const getEncryptedCollectionFiles = async (
             },
         );
         const diff = resp.data.diff;
-        files = files.concat(diff.filter((file) => !file.isDeleted));
+        files = files.concat(diff.filter((file: EnteFile) => !file.isDeleted));
         sinceTime = diff.reduce(
-            (max, file) => Math.max(max, file.updationTime),
+            (max: number, file: EnteFile) => Math.max(max, file.updationTime),
             sinceTime,
         );
     } while (resp.data.hasMore);