diff --git a/lib/mjml/parser.rb b/lib/mjml/parser.rb
index 2650a75..bbf89cf 100644
--- a/lib/mjml/parser.rb
+++ b/lib/mjml/parser.rb
@@ -6,7 +6,7 @@ class Parser
     class InvalidTemplate < StandardError; end
     class ExecutableNotFound < StandardError; end
 
-    ROOT_TAGS_REGEX = %r{<mjml>.*<\/mjml>}im
+    ROOT_TAGS_REGEX = %r{<mjml.*>.*<\/mjml>}im
 
     def initialize
       MJML.logger.debug("Path: #{mjml_bin};" \
diff --git a/lib/mjml/version.rb b/lib/mjml/version.rb
index 78b758b..4064d4a 100644
--- a/lib/mjml/version.rb
+++ b/lib/mjml/version.rb
@@ -1,3 +1,3 @@
 module MJML
-  VERSION = '0.3.5'.freeze
+  VERSION = '0.3.6'.freeze
 end
diff --git a/spec/fixtures/hello.mjml b/spec/fixtures/hello.mjml
index 603ed28..c488789 100644
--- a/spec/fixtures/hello.mjml
+++ b/spec/fixtures/hello.mjml
@@ -1,4 +1,4 @@
-<mjml>
+<mjml owa="desktop">
   <mj-body>
     <mj-container>
       <mj-section padding-top="20px 10%">