diff --git a/docs/concepts/overview/object-management-kubectl/overview.md b/docs/concepts/overview/object-management-kubectl/overview.md
index 9828cc0bbc..22f828144c 100644
--- a/docs/concepts/overview/object-management-kubectl/overview.md
+++ b/docs/concepts/overview/object-management-kubectl/overview.md
@@ -14,6 +14,7 @@ approaches.
 
 **Warning:** A Kubernetes object should be managed using only one technique. Mixing
 and matching techniques for the same object results in undefined behavior.
+{: .warning}
 
 | Management technique             | Operates on          |Recommended environment | Supported writers  | Learning curve |
 |----------------------------------|----------------------|------------------------|--------------------|----------------|