diff --git a/xin0.md b/xin0.md
index 9e368f9e6..d6ecfb82c 100644
--- a/xin0.md
+++ b/xin0.md
@@ -41,4 +41,5 @@
 	- [[unigraph]]
 	- [[agora]]
 		- is it a [[decentralized think tank]] plus a set of tools to optimize itself?
-		- yeah, pretty much :)
\ No newline at end of file
+		- yeah, pretty much :)
+	- [[barrier of entry]]
\ No newline at end of file