diff --git a/oxidized-web.gemspec b/oxidized-web.gemspec
index 1c15e95..b142583 100644
--- a/oxidized-web.gemspec
+++ b/oxidized-web.gemspec
@@ -37,7 +37,7 @@ Gem::Specification.new do |s|
   s.add_dependency 'emk-sinatra-url-for', '~> 0.2'
   # HAML 7.0.0 changed default attr_quote from ' to ".
   # Updating needs the unit tests to be fixed.
-  s.add_dependency 'haml',                '>= 6', '<7'
+  s.add_dependency 'haml',                '>= 6', '< 8'
   s.add_dependency 'htmlentities',        '~> 4.3'
   s.add_dependency 'json',                '~> 2.3'
   # Only depend on a minimal version of Oxidized so we don't need to