[DOC] important disclaimer
diff --git a/README.md b/README.md
index 9aa3f83..bf633b8 100644
--- a/README.md
+++ b/README.md
@@ -105,6 +105,11 @@
 This should merge the GDSes using magic and you'll end up with your version of `./gds/caravel.gds`. You should expect ~90 magic DRC violations with the current "development" state of caravel.
+Please make sure to run `make compress` before commiting anything to your repository. Avoid having 2 versions of the gds/user_project_wrapper.gds or gds/caravel.gds one compressed and the other not compressed.
 ## Required Directory Structure
 - ./gds/ : includes all the gds files used or produced from the project.