diff --git a/.travis.yml b/.travis.yml
index 9e8369d7..1953b61e 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -12,6 +12,9 @@ node_js:
 - '8'
 cache:
 - node_modules
+branches:
+   except:
+   - stable
 before_install:
 - export DISPLAY=:99.0
 - sh -e /etc/init.d/xvfb start
diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index ea0b8688..95e8a028 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -1,4 +1,4 @@
 Contributing
 ========================================
 
-Information about contributing can be found on the following page: <https://github.com/ckeditor/ckeditor5/blob/master/CONTRIBUTING.md>.
+See the [official contributors' guide to CKEditor 5](https://ckeditor.com/docs/ckeditor5/latest/framework/guides/contributing/contributing.html) to learn more.