diff --git a/internal/federation/federatingdb/db.go b/internal/federation/federatingdb/db.go
index cd5110923..230098073 100644
--- a/internal/federation/federatingdb/db.go
+++ b/internal/federation/federatingdb/db.go
@@ -84,6 +84,6 @@ func New(
 		intFilter:  intFilter,
 		spamFilter: spamFilter,
 	}
-	fdb.activityIDs.Init(0, 1000)
+	fdb.activityIDs.Init(0, 2048)
 	return &fdb
 }