diff --git a/rootfs_overlay/etc/unbound/unbound.conf b/rootfs_overlay/etc/unbound/unbound.conf
index 1c52dda..cc18016 100644
--- a/rootfs_overlay/etc/unbound/unbound.conf
+++ b/rootfs_overlay/etc/unbound/unbound.conf
@@ -113,4 +113,17 @@ server:
     # have write permission.
     auto-trust-anchor-file: /etc/unbound/root.key
 
+    # Number of ports to open. This number of file descriptors can be opened per thread.
+    # Must be at least 1. Default depends on compile options. Larger numbers need extra
+    # resources from the operating system. For performance a very large value is best,
+    # use libevent to make this possible.
+    outgoing-range: 8192
+
+    # The number of queries that every thread will service simultaneously. If more queries
+    # arrive that need servicing, and no queries can be jostled out (see jostle-timeout),
+    # then the queries are dropped. This forces the client to resend after a timeout;
+    # allowing the server time to work on the existing queries. Default depends on
+    # compile options, 512 or 1024.
+    num-queries-per-thread: 4096
+
     include: /etc/unbound/a-records.conf