diff --git a/How-to-enable-stylistic-sets.md b/How-to-enable-stylistic-sets.md
index ed86b62..c80bbc3 100644
--- a/How-to-enable-stylistic-sets.md
+++ b/How-to-enable-stylistic-sets.md
@@ -33,6 +33,8 @@ Since version [1.40](https://code.visualstudio.com/updates/v1_40#_font-feature-s
 "editor.fontLigatures": "'ss01', 'ss02', 'ss03', 'ss04', 'ss05', 'ss06', 'zero', 'onum'"
 ```
 
+To avoid possible bugs, you must uninstall Fira Code 1.x before installing Fira Code 2.0.
+
 # CSS
 
 ```css