lutaml-xmi.gemspec in lutaml-xmi-0.2.1 vs lutaml-xmi.gemspec in lutaml-xmi-0.2.2

@@ -25,9 +25,10 @@
 
   spec.add_runtime_dependency "hashie", "~> 4.1.0"
   spec.add_runtime_dependency "thor", "~> 1.0"
   spec.add_runtime_dependency "lutaml-uml"
   spec.add_runtime_dependency "nokogiri", "~> 1.10"
+  spec.add_runtime_dependency "htmlentities"
 
   spec.add_development_dependency "bundler", "~> 2.0"
   spec.add_development_dependency "byebug"
   spec.add_development_dependency "pry", "~> 0.12.2"
   spec.add_development_dependency "rake", "~> 10.0"