diff --git a/scripts/install b/scripts/install
index 40e2b4a..37391c4 100644
--- a/scripts/install
+++ b/scripts/install
@@ -52,7 +52,6 @@ ynh_app_setting_set --app=$app --key=domain --value=$domain
 ynh_app_setting_set --app=$app --key=path --value=$path_url
 ynh_app_setting_set --app=$app --key=admin --value=$admin
 ynh_app_setting_set --app=$app --key=password --value=$password
-ynh_app_setting_set --app=$app --key=is_public --value=$is_public
 ynh_app_setting_set --app=$app --key=users_status --value=$users_status
 
 #=================================================
@@ -122,7 +121,7 @@ ynh_permission_update --permission="main" --add="visitors"
 # Installation with curl
 ynh_script_progression --message="Finalizing installation..."
 ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=chmod"
-ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=2" "chmod=755" "adresse_db=localhost" "login_db=$db_name" "pass_db=$db_pwd" "server_db=mysql"
+ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=2" "chmod=750" "adresse_db=localhost" "login_db=$db_name" "pass_db=$db_pwd" "server_db=mysql"
 ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=3" "adresse_db=localhost" "login_db=$db_name" "pass_db=$db_pwd" "server_db=mysql" "choix_db=$db_name" "tprefix=$db_name"
 # For now spip have a problem with LDAP
 #ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=ldap1"
diff --git a/scripts/upgrade b/scripts/upgrade
index a02bfeb..2fb6f35 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -20,7 +20,6 @@ domain=$(ynh_app_setting_get --app=$app --key=domain)
 path_url=$(ynh_app_setting_get --app=$app --key=path)
 admin=$(ynh_app_setting_get --app=$app --key=admin)
 password=$(ynh_app_setting_get --app=$app --key=password)
-is_public=$(ynh_app_setting_get --app=$app --key=is_public)
 final_path=$(ynh_app_setting_get --app=$app --key=final_path)
 users_status=$(ynh_app_setting_get --app=$app --key=users_status)
 db_name=$(ynh_app_setting_get --app=$app --key=db_name)
@@ -60,13 +59,10 @@ ynh_abort_if_errors
 #=================================================
 ynh_script_progression --message="Ensuring downward compatibility..."
 
-# Fix is_public as a boolean value
-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
+is_public=$(ynh_app_setting_get --app=$app --key=is_public)
+# Remove is_public
+if [ -n "$is_public" ]; then
+	ynh_app_setting_delete --app=$app --key=is_public
 fi
 
 # If db_name doesn't exist, create it
@@ -170,8 +166,15 @@ chown -R $app:www-data "$final_path"
 
 # Set the app as temporarily public for curl call
 ynh_script_progression --message="Configuring SSOwat..."
-# Making the app public for curl
-ynh_permission_update --permission="main" --add="visitors"
+
+
+if ! ynh_permission_has_user --permission=main --user="visitors"; then
+	is_public=0
+	# Making the app public for curl
+	ynh_permission_update --permission="main" --add="visitors"
+else
+	is_public=1
+fi
 
 ynh_backup_if_checksum_is_different --file="$final_path/config/connect.php"
 
@@ -180,7 +183,7 @@ mv $final_path/config/connect.php $final_path/config/connect.php.ynh_bkp
 # Installation with curl
 ynh_script_progression --message="Finalizing installation..."
 ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=chmod"
-ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=2" "chmod=755" "adresse_db=localhost" "login_db=$db_name" "pass_db=$db_pwd" "server_db=mysql"
+ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=2" "chmod=750" "adresse_db=localhost" "login_db=$db_name" "pass_db=$db_pwd" "server_db=mysql"
 ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=3" "adresse_db=localhost" "login_db=$db_name" "pass_db=$db_pwd" "server_db=mysql" "choix_db=$db_name" "tprefix=$db_name"
 # For now spip have a problem with LDAP
 #ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=ldap1"
@@ -206,9 +209,6 @@ email=$(yunohost user info $admin | grep mail: | cut -d' ' -f2 | tr -d '\n')
 ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=3b" "adresse_db=localhost" "login_db=$db_name" "pass_db=$db_pwd" "server_db=mysql" "sel_db=$db_name" "nom=$admin" "email=$email" "login=$admin" "pass=$password" "pass_verif=$password"
 ynh_local_curl "/ecrire/?suivant" "exec=install" "etape=fin"
 
-# Remove the public access
-ynh_permission_update --permission="main" --remove="visitors"
-
 #=================================================
 # UPDATE A CONFIG FILE
 #=================================================
@@ -235,12 +235,10 @@ ynh_store_file_checksum --file="$final_path/config/connect.php"
 #=================================================
 ynh_script_progression --message="Configuring permissions..."
 
-# Make app public if necessary
-if [ $is_public -eq 1 ]
+# Make app private if necessary
+if [ $is_public -eq 0 ]
 then
-	# Everyone can access the app.
-	# The "main" permission is automatically created before the install script.
-	ynh_permission_update --permission="main" --add="visitors"
+	ynh_permission_update --permission="main" --remove="visitors"
 fi
 
 #=================================================