diff --git a/how-to-setup-a-policy-namespace-for-containers.md b/how-to-setup-a-policy-namespace-for-containers.md
index cb4ee32..e11a374 100644
--- a/how-to-setup-a-policy-namespace-for-containers.md
+++ b/how-to-setup-a-policy-namespace-for-containers.md
@@ -1,6 +1,6 @@
 # Intro
 
-bla bla bla
+bla bla bla, dependent on apparmor version and kernel version
 
 # snappy