diff --git a/src/routes/boost/post/+server.ts b/src/routes/boost/post/+server.ts
index 3717dad1..cdd36105 100644
--- a/src/routes/boost/post/+server.ts
+++ b/src/routes/boost/post/+server.ts
@@ -51,7 +51,7 @@ export async function POST({ request }) {
 						return axios
 							.patch(
 								`https://api.btcmap.org/v2/elements/${element}/tags`,
-								{ 'boost:expires': `${expires.toISOString()}` },
+								{ tags: { 'boost:expires': `${expires.toISOString()}` } },
 								{ headers }
 							)
 							.then(function (response) {