diff --git a/hooks/post_app_addaccess b/hooks/post_app_addaccess
index 47fed69..a9ca384 100644
--- a/hooks/post_app_addaccess
+++ b/hooks/post_app_addaccess
@@ -12,6 +12,7 @@ if [ "$app" == __APP__ ]; then
     if [ "$permission" = "upload images" ]; then
         if [ "$added_groups" = "visitors" ]; then
             ynh_app_setting_delete --app=$app --key=protected_regex
+            ynh_app_setting_set --app=$app --key=is_public --value=1
 
             yunohost app ssowatconf
         else
diff --git a/hooks/post_app_removeaccess b/hooks/post_app_removeaccess
index d78cd20..8c4a928 100644
--- a/hooks/post_app_removeaccess
+++ b/hooks/post_app_removeaccess
@@ -15,6 +15,7 @@ if [ "$app" == __APP__ ]; then
             path_url=$(ynh_app_setting_get --app=$app --key=path)
             domain_regex=$(echo "$domain" | sed 's@-@.@g')
             ynh_app_setting_set --app=$app --key=protected_regex --value="$domain_regex$path_url/stats/?$","$domain_regex$path_url/manifest.webapp/?$","$domain_regex$path_url/?$","$domain_regex$path_url/[d-m]/.*$"
+            ynh_app_setting_set --app=$app --key=is_public --value=0
 
             yunohost app ssowatconf
         else
diff --git a/scripts/change_url b/scripts/change_url
index d107825..9fdfded 100644
--- a/scripts/change_url
+++ b/scripts/change_url
@@ -27,6 +27,7 @@ app=$YNH_APP_INSTANCE_NAME
 ynh_script_progression --message="Loading installation settings..." --weight=2
 
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
+is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 port=$(ynh_app_setting_get --app=$app --key=port)
 
 #=================================================
@@ -121,7 +122,7 @@ fi
 #=================================================
 ynh_script_progression --message="Reconfiguring SSOwat..."
 
-if [ ! -z $(ynh_app_setting_get --app=$app --key=protected_regex) ] # Only user with a yunohost account can upload an image
+if [ $is_public -eq 0 ] # Only user with a yunohost account can upload an image
 then
 	# If the app is private, viewing images stays publicly accessible.
 	if [ "$new_path" == "/" ]; then
diff --git a/scripts/install b/scripts/install
index 0883271..15d8a39 100644
--- a/scripts/install
+++ b/scripts/install
@@ -49,6 +49,7 @@ ynh_webpath_register --app=$app --domain=$domain --path_url=$path_url
 ynh_script_progression --message="Storing installation settings..." --weight=2
 
 ynh_app_setting_set --app=$app --key=domain --value=$domain
+ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 ynh_app_setting_set --app=$app --key=always_encrypt --value=$always_encrypt
 
 ynh_app_setting_set --app=$app --key=overwrite_settings --value=1
diff --git a/scripts/upgrade b/scripts/upgrade
index 4782583..33835d8 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,6 +20,7 @@ app=$YNH_APP_INSTANCE_NAME
 
 domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
+is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 port=$(ynh_app_setting_get --app=$app --key=port)
 always_encrypt=$(ynh_app_setting_get --app=$app --key=always_encrypt)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
@@ -47,6 +48,15 @@ upgrade_type=$(ynh_check_app_version_changed)
 #=================================================
 ynh_script_progression --message="Ensuring downward compatibility..." --weight=2
 
+# Fix is_public as a boolean
+if [ "$is_public" = "Yes" ]; then
+	ynh_app_setting_set --app=$app --key=is_public --value=1
+	is_public=1
+elif [ "$is_public" = "No" ]; then
+	ynh_app_setting_set --app=$app --key=is_public --value=0
+	is_public=0
+fi
+
 if [ ! -z "$skipped_uris" ]; then
 	ynh_app_setting_delete --app=$app --key=skipped_uris
 fi
@@ -263,7 +273,7 @@ ynh_script_progression --message="Upgrading permission..."
 
 if ! ynh_permission_exists --permission="upload images"
 then
-	if [ -z $(ynh_app_setting_get --app=$app --key=protected_regex) ] # Everyone can upload image
+	if [ $is_public -eq 1 ] # Everyone can upload image
 	then
 		ynh_permission_create --permission="upload images" --allowed="visitors"
 	else # Only user with a yunohost account can upload an image