diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 41cc35725..5a05afff9 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -78,10 +78,13 @@ You can fork the GitHub repository using the Fork button at
 
 The Pull Requests (PR) systems works in this way:
 
-1. You've to create a new branch from `master`, e.g. `fix-8` to fix the issue 8.
-1. Start working on that new branch, and push that branch to your fork.
-1. Create a new PR to merge your `fix-8` branch to official `master`.
-1. If the PR is accepted, your branch is merged into `master`.
+1. First of all you will need to sign our
+   [Contributor License Agreement](https://github.com/aseprite/opensource/blob/master/sign-cla.md#sign-the-cla) (CLA).
+1. Then you can start working on Aseprite. Create a new branch from `master`, e.g. `fix-8` to fix the issue 8.
+1. Start working on that new branch, and push your commits to your fork.
+1. Create a new PR to merge your `fix-8` branch to the official `master`.
+1. If the PR is accepted (does not require review/comments/modifications),
+   your branch is merged into `master`.
 1. You will need to pull changes from the official `master` branch, and
    merge them in your own `master` branch. Finally you can discard your
    own `fix-8` branch (because those changes should be already merged