diff --git a/Contributing.md b/Contributing.md
index c9cfff5..469c165 100644
--- a/Contributing.md
+++ b/Contributing.md
@@ -67,7 +67,7 @@ Make sure that your code follows our [[Style Guide]] and run from the PDF.js fol
 gulp lint
 ```
 
-_Protip_: If you are a Vim user, then install [Syntastic](http://www.vim.org/scripts/script.php?script_id=2736), install ESLint globally using `npm install -g eslint` and add the following line to your `.vimrc`:
+_Protip_: If you are a Vim user, then install [Syntastic](https://www.vim.org/scripts/script.php?script_id=2736), install ESLint globally using `npm install -g eslint` and add the following line to your `.vimrc`:
 
 ```
 let g:syntastic_javascript_checkers=['eslint']