diff --git a/scripts/install b/scripts/install
index f42fe7d..b6205b1 100644
--- a/scripts/install
+++ b/scripts/install
@@ -48,8 +48,9 @@ ynh_script_progression --message="Adding a configuration file..." --weight=1
 
 ynh_add_config --template="../conf/config.json" --destination="$install_dir/config.json"
 
-#chmod -R o-rwx "$install_dir"
-#chown -R $app:www-data "$install_dir"
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
+chown -R $app:www-data "$install_dir"
 
 #=================================================
 # END OF SCRIPT
diff --git a/scripts/restore b/scripts/restore
index d1d9a3e..fbc70ff 100644
--- a/scripts/restore
+++ b/scripts/restore
@@ -26,8 +26,9 @@ ynh_script_progression --message="Restoring the app main directory..." --weight=
 
 ynh_restore_file --origin_path="$install_dir"
 
-#chmod -R o-rwx "$install_dir"
-#chown -R $app:www-data "$install_dir"
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
+chown -R $app:www-data "$install_dir"
 
 #=================================================
 # GENERIC FINALIZATION
diff --git a/scripts/upgrade b/scripts/upgrade
index 297e885..42e2d25 100644
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -48,18 +48,19 @@ then
 	ynh_script_progression --message="Upgrading source files..." --weight=1
 
 	# Download, check integrity, uncompress and patch the source from app.src
-	ynh_setup_source --dest_dir="$install_dir"
+	ynh_setup_source --dest_dir="$install_dir" --keep="config.json"
 fi
 
+chmod 750 "$install_dir"
+chmod -R o-rwx "$install_dir"
+chown -R $app:www-data "$install_dir"
+
 #=================================================
 # ADD A CONFIGURATION
 #=================================================
-ynh_script_progression --message="Adding a configuration file..." --weight=1
+#ynh_script_progression --message="Adding a configuration file..." --weight=1
 
-ynh_add_config --template="../conf/config.json" --destination="$install_dir/config.json"
-
-#chmod -R o-rwx "$install_dir"
-#chown -R $app:www-data "$install_dir"
+#ynh_add_config --template="../conf/config.json" --destination="$install_dir/config.json"
 
 #=================================================
 # NGINX CONFIGURATION