diff --git a/HISTORY.md b/HISTORY.md
index bb4930d4..4963e7d5 100644
--- a/HISTORY.md
+++ b/HISTORY.md
@@ -5,6 +5,7 @@ Here's Cloudflare incidents.
 [//]: # (do not edit me; start)
 
 
+- 2021-05-23: [Increased HTTP 525 Errors in Chennai, India area.](https://web.archive.org/web/https://www.cloudflarestatus.com/incidents/hlbqj7dc9dnn)
 - 2021-05-19: [Increased Level of DNS Query Errors](https://web.archive.org/web/https://www.cloudflarestatus.com/incidents/hmnnzb3wsm2z)
 - 2021-05-19: [Possible Network Congestion in Mumbai, India area.](https://web.archive.org/web/https://www.cloudflarestatus.com/incidents/pkcqpwdvqwg4)
 - 2021-05-18: [DNS Queries Issue](https://web.archive.org/web/https://www.cloudflarestatus.com/incidents/qk2x3w1rr14v)