diff --git a/core/src/exchanges/metaculus/fetchEvents.ts b/core/src/exchanges/metaculus/fetchEvents.ts
index 7aec4aa3..f6eba884 100644
--- a/core/src/exchanges/metaculus/fetchEvents.ts
+++ b/core/src/exchanges/metaculus/fetchEvents.ts
@@ -42,7 +42,7 @@ async function fetchPostPages(
         const results: any[] = data.results ?? [];
         if (results.length === 0) break;
 
-        all = all.concat(results);
+        all.push(...results);
         offset += results.length;
         page++;