diff --git a/scripts/upgrade b/scripts/upgrade
index 7d9c0de..739633c 100755
--- a/scripts/upgrade
+++ b/scripts/upgrade
@@ -72,7 +72,7 @@ then
 	ynh_script_progression --message="Upgrading source files..." --time --weight=1
 
 	# Download, check integrity, uncompress and patch the source from app.src
-	ynh_setup_source --dest_dir="$final_path" --keep="$final_path/.env"
+	ynh_setup_source --dest_dir="$final_path" --keep=".env"
 fi
 
 # FIXME: this should be managed by the core in the future
@@ -118,6 +118,20 @@ ynh_script_progression --message="Upgrading PHP-FPM configuration..."
 # Create a dedicated php-fpm config
 ynh_add_fpm_config --package="$extra_php_dependencies"
 
+#=================================================
+# UPDATE A CONFIG FILE
+#=================================================
+
+if [ "$upgrade_type" == "UPGRADE_APP" ]
+then
+       ynh_script_progression --message="Updating a configuration file..."
+
+       ynh_add_config --template="default.env" --destination="$final_path/.env"
+
+       chmod 400 "$final_path/.env"
+       chown $app:$app "$final_path/.env"
+fi
+
 #=================================================
 # UPGRADE DATABASE
 #=================================================