diff --git a/lib/govuk_schemas.rb b/lib/govuk_schemas.rb
index 967bb34..c13b91a 100644
--- a/lib/govuk_schemas.rb
+++ b/lib/govuk_schemas.rb
@@ -1,6 +1,5 @@
 require "govuk_schemas/version"
 require "govuk_schemas/schema"
-require "govuk_schemas/utils"
 require "govuk_schemas/random_example"
 require "govuk_schemas/document_types"
 require "govuk_schemas/example"
diff --git a/lib/govuk_schemas/random_content_generator.rb b/lib/govuk_schemas/random_content_generator.rb
index 1700b70..c2d90a9 100644
--- a/lib/govuk_schemas/random_content_generator.rb
+++ b/lib/govuk_schemas/random_content_generator.rb
@@ -53,7 +53,10 @@ def anchor
     end
 
     def random_identifier(separator:)
-      Utils.parameterize(WORDS.sample(@random.rand(1..10), random: @random).join("-")).gsub("-", separator)
+      WORDS.sample(@random.rand(1..10), random: @random)
+        .join("-")
+        .gsub(/[^a-z0-9\-_]+/i, "-")
+        .gsub("-", separator)
     end
 
     def uuid
diff --git a/lib/govuk_schemas/utils.rb b/lib/govuk_schemas/utils.rb
deleted file mode 100644
index 0219c47..0000000
--- a/lib/govuk_schemas/utils.rb
+++ /dev/null
@@ -1,8 +0,0 @@
-module GovukSchemas
-  # @private
-  module Utils
-    def self.parameterize(string)
-      string.gsub(/[^a-z0-9\-_]+/i, "-")
-    end
-  end
-end