diff --git a/README.md b/README.md
index 9204f77..cda8b2e 100644
--- a/README.md
+++ b/README.md
@@ -22,6 +22,8 @@ Installation
 
 5. Visit https://wakati.me to see your logged time.
 
+6. Consider installing [BIND9](https://help.ubuntu.com/community/BIND9ServerHowto#Caching_Server_configuration) to cache your repeated DNS requests: `sudo apt-get install bind9`
+
 Screen Shots
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