Gemfile in how_is-24.0.0 vs Gemfile in how_is-25.0.0

@@ -1,11 +1,15 @@
 # frozen_string_literal: true
 
 source "https://rubygems.org"
 
-# how_is only supports Ruby versions receiving general bug fixes ("normal
-# maintenance"). This should be updated when a Ruby version goes into security
-# maintenance. Ruby maintenance: https://www.ruby-lang.org/en/downloads/branches/
-ruby "~> 2.3"
+# how_is only supports Ruby versions under "normal maintenance".
+# This number should be updated when a Ruby version goes into security
+# maintenance.
+#
+# Ruby maintenance info: https://www.ruby-lang.org/en/downloads/branches/
+#
+# NOTE: Update how_is.gemspec when this is updated!
+ruby "~> 2.4"
 
 # Specify your gem's dependencies in how_is.gemspec
 gemspec