diff --git a/app/controllers/concerns/hyrax/works_controller_behavior.rb b/app/controllers/concerns/hyrax/works_controller_behavior.rb
index 1845904f62..3a5c040bce 100644
--- a/app/controllers/concerns/hyrax/works_controller_behavior.rb
+++ b/app/controllers/concerns/hyrax/works_controller_behavior.rb
@@ -176,7 +176,8 @@ def iiif_manifest_builder
 
     def iiif_manifest_presenter
       IiifManifestPresenter.new(search_result_document(id: params[:id])).tap do |p|
-        p.hostname = request.base_url
+        # Have to force the encoding of base_url to UTF8 because Loofah will strip out ASCII-8BIT strings in Hyrax::ManifestBuilderService#deep_sanitize
+        p.hostname = request.base_url.force_encoding('UTF-8')
         p.ability = current_ability
       end
     end
diff --git a/spec/features/iiif_manifest_spec.rb b/spec/features/iiif_manifest_spec.rb
index 6292246f53..31393dd121 100644
--- a/spec/features/iiif_manifest_spec.rb
+++ b/spec/features/iiif_manifest_spec.rb
@@ -18,6 +18,7 @@
     visit "/concern/generic_works/#{work.id}/manifest"
     manifest_json = JSON.parse(page.body)
 
+    expect(manifest_json['@id']).to match "http://.*/concern/monographs/#{work.id}/manifest"
     expect(manifest_json['label']).to eq 'Comet in Moominland'
     expect(manifest_json['description']).to eq 'a novel about moomins'