diff --git a/config/initializers/haml.rb b/config/initializers/haml.rb
index 4298d33..242835a 100644
--- a/config/initializers/haml.rb
+++ b/config/initializers/haml.rb
@@ -1,4 +1,4 @@
-Haml::Template.options = {
+Haml::Template.options.merge!(
   attr_wrapper: '"',
   ugly: true,
-}
+)