diff --git a/apivore.gemspec b/apivore.gemspec
index f375d38..77130e4 100644
--- a/apivore.gemspec
+++ b/apivore.gemspec
@@ -27,8 +27,8 @@ Gem::Specification.new do |s|
   # Hack to support currently suported ruby versions
   # TODO: remove and explicitly require ruby 2.2.2 as min version in version 2 of apivore
   if RUBY_VERSION >= '2.2.2'
-    s.add_runtime_dependency 'actionpack', '~> 6'
-    s.add_development_dependency 'activesupport', '~> 6' 
+    s.add_runtime_dependency 'actionpack', '>= 4'
+    s.add_development_dependency 'activesupport', '>= 4' 
   else
     s.add_runtime_dependency 'actionpack', '< 5'
     s.add_development_dependency 'activesupport', '< 5'
diff --git a/lib/apivore/validator.rb b/lib/apivore/validator.rb
index 223c14e..41518b5 100644
--- a/lib/apivore/validator.rb
+++ b/lib/apivore/validator.rb
@@ -19,13 +19,12 @@ def matches?(swagger_checker)
       pre_checks(swagger_checker)
 
       unless has_errors?
+        args = RailsShim.action_dispatch_request_args(full_path(swagger_checker), params: params['_data'] || {}, headers: params['_headers'] || {})
+
         send(
           method,
-          *RailsShim.action_dispatch_request_args(
-            full_path(swagger_checker),
-            params: params['_data'] || {},
-            headers: params['_headers'] || {}
-          )
+          args[0],
+          **args[1]
         )
         swagger_checker.response = response
         post_checks(swagger_checker)