diff --git a/.storybook/preview.ts b/.storybook/preview.ts
index 8f8149f097..937c51c57a 100644
--- a/.storybook/preview.ts
+++ b/.storybook/preview.ts
@@ -8,7 +8,7 @@ import { SessionType } from "../src/app/core/session/session-type";
 // fixing a mocked "TODAY" to have persistent stories for visual regression testing
 MockDate.set(new Date("2023-06-09"));
 // polyfill buffer here as well
-window.Buffer = buffer.Buffer;
+window["Buffer"] = buffer.Buffer;
 environment.production = false;
 environment.session_type = SessionType.mock;
 environment.demo_mode = false;
@@ -24,7 +24,7 @@ const preview: Preview = {
     },
   },
 
-  tags: ["autodocs"]
+  tags: ["autodocs"],
 };
 
 export default preview;