diff --git a/README.md b/README.md
index 04f9b91..6764ebb 100644
--- a/README.md
+++ b/README.md
@@ -4,4 +4,10 @@ This repository contains Rainloop webmail Docker container build scripts and nec
 
 ## Persistent things
 
-There are some things that should be preserved between container's restarts. Please, add new volume for ``/var/www/rainloop/data`` directory.
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+There are some things that should be preserved between container's restarts. Please, add new volume for ``/var/www/rainloop/data`` directory.
+
+If you're binding directory except of creating volume please do proper ``chown``:
+
+```shell
+chown -R 100:101 /dir/with/data
+```
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