diff --git a/README.md b/README.md
index 7f57f62..2ac629b 100644
--- a/README.md
+++ b/README.md
@@ -422,7 +422,7 @@ performance of any of your sites from across the globe.
:small_orange_diamond: Ostorlab - analyzes mobile application to identify vulnerabilities and potential weaknesses.
:small_orange_diamond: Startpage - the world's most private search engine.
@@ -450,7 +450,7 @@ performance of any of your sites from across the globe.
#### Systems/Services [[TOC]](#anger-table-of-contents)
-##### :black_small_square: Systems
+##### :black_small_square: Operating Systems
:small_orange_diamond: Slackware - the most "Unix-like" Linux distribution.
@@ -474,7 +474,7 @@ performance of any of your sites from across the globe.
:small_orange_diamond: Emerald Onion - seattle-based encrypted-transit internet service provider.
:small_orange_diamond: Unbound - validating, recursive, and caching DNS resolver (with TLS).
:small_orange_diamond: Knot Resolver - caching full resolver implementation, including both a resolver library and a daemon.
- :small_orange_diamond: Vulnreport - open-source pentesting management and automation platform by Salesforce Product Security.
+ :small_orange_diamond: pi-hole - The Pi-holeĀ® is a DNS sinkhole that protects your devices from unwanted content.