diff --git a/README.md b/README.md
index e197f20..23b8e55 100644
--- a/README.md
+++ b/README.md
@@ -56,6 +56,7 @@ folder and update font cache.
 
 I only tested in MacVim so far (this is the only editor I use). Comments and bug
 reports welcome. MacVim should be quite recent for ligatures to work.
+**Note**: Versions of MacVim above 8.1-146 seem to have a regression where ligatures are not displayed correctly. Use `brew pin` to maintain your MacVim version below this until this is fixed.
 
 Add the following to your `.vimrc`: