diff --git a/Gemfile b/Gemfile
index c8cb07a..6b3d7f0 100644
--- a/Gemfile
+++ b/Gemfile
@@ -7,3 +7,8 @@ ruby "3.4.6"
 gem "cssminify2", "~> 2.0"
 gem "json", "~> 2.7"
 gem "terser", "~> 1.2"
+
+# dev dependencies
+group :development do
+  gem "webrick", "~> 1.9"
+end
diff --git a/scripts/parse_formulas.rb b/scripts/parse_formulas.rb
index bc7be08..5d5ae5c 100755
--- a/scripts/parse_formulas.rb
+++ b/scripts/parse_formulas.rb
@@ -11,7 +11,7 @@ require "date"
 class String
   def blank?
     # Polyfill implementation to avoid external dependencies
-    nil? || empty? # rubocop:disable Homebrew/Blank
+    nil? || empty? # rubocop:disable Homebrew/Blank, Lint/RedundantCopDisableDirective
   end
 end