diff --git a/README.md b/README.md
index e2afa69..0ddf1f5 100644
--- a/README.md
+++ b/README.md
@@ -7,3 +7,12 @@ With gcc, make, cmake, ninja and Espressif's eim-cli preinstalled.
 ```bash
 toolbox create -c dev -i oci.drath.cc/drath/dev-toolbx:44
 ```
+
+### Additional notes
+
+You may also want to adjust system's default toolbx image inside `~/.config/containers/toolbox.conf`
+
+```ini
+[general]
+image = "oci.drath.cc/drath/dev-toolbx:44"
+```