diff --git a/docs/security/hardening-guide.md b/docs/security/hardening-guide.md
index 17b84b744..d64cb0a8b 100644
--- a/docs/security/hardening-guide.md
+++ b/docs/security/hardening-guide.md
@@ -31,7 +31,6 @@ vm.panic_on_oom=0
 vm.overcommit_memory=1
 kernel.panic=10
 kernel.panic_on_oops=1
-kernel.keys.root_maxbytes=25000000
 ```
 
 ## Kubernetes Runtime Requirements