diff --git a/src/index.ts b/src/index.ts
index 3cf5b16..08def16 100644
--- a/src/index.ts
+++ b/src/index.ts
@@ -199,7 +199,7 @@ export class TopsortBanner extends LitElement {
       headers: {
         Authorization: `Bearer ${token}`,
         "Content-Type": "application/json",
-        "X-UA": `topsort/banners-${import.meta.env.PACKAGE_VERSION} (${device}})`,
+        "X-UA": `topsort/banners-${import.meta.env.PACKAGE_VERSION} (${device})`,
       },
       body: JSON.stringify({
         auctions: [auction],