diff --git a/CHANGELOG.md b/CHANGELOG.md
index 46b04b35..a4418f19 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -7,7 +7,7 @@
 - TBD
 
 ## Other changes
-- TBD
+- [Docs] Fixed typo in Alerta docs with incorrect number of seconds in a day. - @jertel
 
 # 2.18.0
 
diff --git a/docs/source/alerts.rst b/docs/source/alerts.rst
index 65c7c0fc..cdbc5efb 100644
--- a/docs/source/alerts.rst
+++ b/docs/source/alerts.rst
@@ -247,7 +247,7 @@ The following options dictate the values of the API JSON payload:
 
 ``alerta_severity``: Defaults to "warning".
 
-``alerta_timeout``: Defaults 84600 (1 Day).
+``alerta_timeout``: Defaults 86400 (1 Day).
 
 ``alerta_type``: Defaults to "elastalert".