diff --git a/CONTRIBUTING.md b/CONTRIBUTING.md
index 64dcd4f930..6746e0c3ea 100644
--- a/CONTRIBUTING.md
+++ b/CONTRIBUTING.md
@@ -83,6 +83,8 @@ your [`$PATH`](http://unix.stackexchange.com/questions/26047/how-to-correctly-ad
 * Ensure the test are passing (`make test`)
 * Create new pull request explaining your proposed change or reference an issue in your commit message
 
+>Note: Babel moves fast. Only the latest release is guaranteed to build correctly.
+>Older releases are not officially supported. If you attempt to build them, do that at your own risk.
 
 #### Dependencies