diff --git a/Dockerfile b/Dockerfile
index 0601062..ca24a48 100644
--- a/Dockerfile
+++ b/Dockerfile
@@ -1,4 +1,4 @@
-FROM python:3.9.2
+FROM python:3.9
 
 
 SHELL ["/bin/bash", "-o", "pipefail", "-c"]
diff --git a/examples/list-my-own-vms.sh b/examples/list-my-own-vms.sh
index 415aa7c..fb3f701 100644
--- a/examples/list-my-own-vms.sh
+++ b/examples/list-my-own-vms.sh
@@ -14,9 +14,9 @@ cat << EOF
 Usage: ${0##*/} [-h] --site  <SITE> --vo <VO>
 List all VMs owned by the user in the given VO/site
 Arguments:
-	  -h, --help, help  : Display this help message and exit
-	  --site <SITE>     :	Site name
-	  --vo <VO>         : VO name
+    -h, --help, help  : Display this help message and exit
+    --site <SITE>     : Site name
+    --vo <VO>         : VO name
 EOF
 }
 
diff --git a/fedcloudclient/sites.py b/fedcloudclient/sites.py
index 0afb171..6d04d6c 100644
--- a/fedcloudclient/sites.py
+++ b/fedcloudclient/sites.py
@@ -27,6 +27,8 @@
     "https://raw.githubusercontent.com/tdviet/fedcloudclient/master/config/sites.yaml"
 )
 
+# ALL FILES in this site-config directory WILL BE DELETED  at every execution
+# of "fedcloud site save-config" command. Do not change it to a common directory
 __LOCAL_CONFIG_DIR = ".config/fedcloud/site-config/"
 
 __site_config_data: List[dict] = []