diff --git a/.changeset/fix-default-filename.md b/.changeset/fix-default-filename.md
new file mode 100644
index 00000000000..328053051c8
--- /dev/null
+++ b/.changeset/fix-default-filename.md
@@ -0,0 +1,5 @@
+---
+"electron-updater": patch
+---
+
+fix: default file name of `update.${fileExtension}` for downloaded files in private repositories.
\ No newline at end of file
diff --git a/packages/electron-updater/src/AppUpdater.ts b/packages/electron-updater/src/AppUpdater.ts
index aed7dd87a22..ec0ef011dbd 100644
--- a/packages/electron-updater/src/AppUpdater.ts
+++ b/packages/electron-updater/src/AppUpdater.ts
@@ -636,7 +636,7 @@ export abstract class AppUpdater extends (EventEmitter as new () => TypedEmitter
         return path.basename(urlPath)
       } else {
         // url like /latest, generate name
-        return `update.${taskOptions.fileExtension}`
+        return taskOptions.fileInfo.info.url
       }
     }