diff --git a/.gitignore b/.gitignore
index 79ce88915d7..22e47d17f99 100644
--- a/.gitignore
+++ b/.gitignore
@@ -10,4 +10,5 @@ lerna-debug.log
 npm-debug.log*
 yarn-debug.log*
 yarn-error.log*
+yarn.lock # Don't do this in your projects! We have good reasons to ignore it, but apps usually don't.
 /.changelog