diff --git a/security/certificates/updating-ca-bundle.adoc b/security/certificates/updating-ca-bundle.adoc
index a5a81a05a5f6..6d8bf23fb80a 100644
--- a/security/certificates/updating-ca-bundle.adoc
+++ b/security/certificates/updating-ca-bundle.adoc
@@ -6,6 +6,11 @@ include::_attributes/common-attributes.adoc[]
 
 toc::[]
 
+[IMPORTANT]
+====
+Updating the certificate authority (CA) will cause the nodes of your cluster to reboot.
+====
+
 include::modules/ca-bundle-understanding.adoc[leveloffset=+1]
 
 include::modules/ca-bundle-replacing.adoc[leveloffset=+1]