diff --git a/lua/nvim-tree/actions/open-file.lua b/lua/nvim-tree/actions/open-file.lua
index bb1478ca..461ae1c1 100644
--- a/lua/nvim-tree/actions/open-file.lua
+++ b/lua/nvim-tree/actions/open-file.lua
@@ -1,3 +1,4 @@
+-- Copyright 2019 Yazdani Kiyan under MIT License
 local api = vim.api
 
 local lib = require "nvim-tree.lib"