diff --git a/server.js b/server.js
index 3dba1b3..3cfd8ed 100644
--- a/server.js
+++ b/server.js
@@ -371,8 +371,8 @@ app.post("/public/assignment/respond", async (req, res) => {
             `, [ping.user_id, ping.scraped_id]);
 
         } else {
-            await client.query("UPDATE assignment_pings SET status = 'rejected', expires_at = NOW() WHERE id = $1", [ping.id]);
-        }
+            await client.query("UPDATE assignment_pings SET status = 'rejected', expires_at = $2 WHERE id = $1", [ping.id, new Date()]);
+        }
 
         await client.query('COMMIT');
         res.json({ ok: true });