diff --git a/app/controllers/concerns/hyrax/iiif_av/controller_behavior.rb b/app/controllers/concerns/hyrax/iiif_av/controller_behavior.rb
index cb5eb37..eb72ff5 100644
--- a/app/controllers/concerns/hyrax/iiif_av/controller_behavior.rb
+++ b/app/controllers/concerns/hyrax/iiif_av/controller_behavior.rb
@@ -36,10 +36,7 @@ def manifest
 
         json = iiif_manifest_builder.manifest_for(presenter: iiif_manifest_presenter, iiif_manifest_factory: manifest_factory)
 
-        respond_to do |wants|
-          wants.json { render json: json }
-          wants.html { render json: json }
-        end
+        render json: json
       end
 
       private
diff --git a/hyrax-iiif_av.gemspec b/hyrax-iiif_av.gemspec
index 2626b3c..0a7eafc 100644
--- a/hyrax-iiif_av.gemspec
+++ b/hyrax-iiif_av.gemspec
@@ -16,12 +16,12 @@ Gem::Specification.new do |s|
   s.license     = 'Apache-2.0'
 
   s.files = `git ls-files -z`.split("\x0").reject do |f|
-    f.match(%r{^(test|spec|features)/})
+    f.match(%r{^(test|spec|features)/}) || f == 'bin/rails'
   end
 
-  s.add_dependency "rails", "~>5.1"
+  s.add_dependency "rails", ">= 5.1", "< 8.0"
   s.add_dependency "blacklight"
-  s.add_dependency "hyrax", ">= 2.9", "< 4.0"
+  s.add_dependency "hyrax", ">= 3.5", "< 6.0"
   s.add_dependency "iiif_manifest", "> 0.5"
 
   s.add_development_dependency 'bixby'