diff --git a/about.md b/about.md
index bfcb2ce..76f65d3 100644
--- a/about.md
+++ b/about.md
@@ -49,6 +49,7 @@ them down by category, this is a non-comprehensive set of things I think about,
 - Portable CI
 - GitOps
 - Design Patterns
+- Systems Design
 - Domain Driven Design
 - CQRS
 - Event Sourcing