diff --git a/Gemfile b/Gemfile
index d5270fe..85c6c6b 100644
--- a/Gemfile
+++ b/Gemfile
@@ -60,6 +60,8 @@ end
 # Windows does not include zoneinfo files, so bundle the tzinfo-data gem
 gem "tzinfo-data", platforms: %i[mingw mswin x64_mingw jruby]
 
+# tabler-rubygem is only compatible with bootstrap 4
+# The `bg-variant` mixin has been deprecated as of v4.4.0. It will be removed entirely in v5.
 gem "bootstrap", "~> 4"
 # https://stackoverflow.com/questions/78617432/strange-bundle-update-issue-disappearing-net-pop-0-1-2-dependency
 gem "net-pop", github: "ruby/net-pop"