diff --git a/summary/2021/README.MD b/summary/2021/README.MD
index cb7559b..9cc7de4 100644
--- a/summary/2021/README.MD
+++ b/summary/2021/README.MD
@@ -3,5 +3,7 @@
 Advanced Threat predictions for 2021
 https://securelist.com/apt-predictions-for-2021/99387/
 
+SentinelOne
+https://www.sentinelone.com/blog/sentinelones-cybersecurity-predictions-2021-what-can-we-expect-after-a-year-like-this/
 
 2020-2021-cyber-espionage-report.pdf :verizon