diff --git a/research/openwrt.md b/research/openwrt.md
index 2de665b79d7d7bb7aff4793d6c4c75d3c47843fe..e2e9e03cde1097c36d8360fb066a960c02460e95 100644
--- a/research/openwrt.md
+++ b/research/openwrt.md
@@ -37,8 +37,8 @@ Configuração
 * [Bridged AP [OpenWrt Wiki]](https://wiki.openwrt.org/doc/recipes/bridgedap).
 * [Client Mode Wireless [OpenWrt Wiki]](https://wiki.openwrt.org/doc/howto/clientmode).
 
-Upgrade
--------
+Upgrade de versão
+-----------------
 
 * Referência: [OpenWrt OS upgrade procedure (LuCI or sysupgrade)](http://wiki.openwrt.org/doc/howto/generic.sysupgrade).
 * Baixe e verifique a integridade (sha256sum, gpg, etc) da nova versão do firmware.
@@ -48,3 +48,17 @@ Upgrade
 
     tpc$ scp openwrt-15.05.1-ar71xx-generic-tl-wdr4300-v1-squashfs-factory.bin router:/tmp
     router# sysupgrade -v /tmp/openwrt-15.05.1-ar71xx-generic-tl-wdr4300-v1-squashfs-factory.bin
+
+Upgrade de pacotes
+------------------
+
+Conforme [documentação](http://wiki.openwrt.org/doc/howto/generic.sysupgrade#check_for_any_upgradable_packages), mas sendo também um [procedimento questionável](https://superuser.com/questions/1121313/updating-openwrt-due-to-security-issues):
+
+    opkg update
+    opkg list-upgradable
+    opkg upgrade <pacotes> # certifique-se de que haja espaço suficiente em /
+
+Anúncios de segurança
+---------------------
+
+* [openwrt-security-announce](https://lists.openwrt.org/cgi-bin/mailman/listinfo/openwrt-security-announce)