diff --git a/app/assets/javascripts/services/bridge.ts b/app/assets/javascripts/services/bridge.ts
index d68ab7916..7b0da9931 100644
--- a/app/assets/javascripts/services/bridge.ts
+++ b/app/assets/javascripts/services/bridge.ts
@@ -18,5 +18,5 @@ export interface Bridge {
   onMajorDataChange(): void;
   onInitialDataLoad(): void;
   onSearch(text?: string): void;
-  downloadBackup(): Promise<void>;
+  downloadBackup(): void | Promise<void>;
 }
diff --git a/app/assets/javascripts/ui_models/application.ts b/app/assets/javascripts/ui_models/application.ts
index 9fa8d2caa..8cfa78000 100644
--- a/app/assets/javascripts/ui_models/application.ts
+++ b/app/assets/javascripts/ui_models/application.ts
@@ -156,7 +156,7 @@ export class WebApplication extends SNApplication {
     this.applicationElement.append(el);
   }
 
-  downloadBackup(): Promise<void> {
+  downloadBackup(): void | Promise<void> {
     return this.bridge.downloadBackup();
   }