diff --git a/Gemfile.lock b/Gemfile.lock
index 4beb9f3..de5088a 100644
--- a/Gemfile.lock
+++ b/Gemfile.lock
@@ -99,12 +99,13 @@ GEM
     mime-types (3.3.1)
       mime-types-data (~> 3.2015)
     mime-types-data (3.2021.0225)
-    mini_portile2 (2.4.0)
+    mini_portile2 (2.5.3)
     minitest (5.12.2)
     multi_xml (0.6.0)
     multipart-post (2.1.1)
-    nokogiri (1.10.4)
-      mini_portile2 (~> 2.4.0)
+    nokogiri (1.11.7)
+      mini_portile2 (~> 2.5.0)
+      racc (~> 1.4)
     nyan-cat-formatter (0.12.0)
       rspec (>= 2.99, >= 2.14.2, < 4)
     octokit (4.21.0)
@@ -131,6 +132,7 @@ GEM
       byebug (~> 11.0)
       pry (~> 0.13.0)
     public_suffix (4.0.6)
+    racc (1.5.2)
     rack (2.2.3)
     rack-test (1.1.0)
       rack (>= 1.0, < 3)
diff --git a/spec/lib/diaspora_federation/discovery/h_card_spec.rb b/spec/lib/diaspora_federation/discovery/h_card_spec.rb
index 5c2da01..3c548c3 100644
--- a/spec/lib/diaspora_federation/discovery/h_card_spec.rb
+++ b/spec/lib/diaspora_federation/discovery/h_card_spec.rb
@@ -25,10 +25,9 @@ module DiasporaFederation
 
     let(:html) { <<~HTML }
       <!DOCTYPE html PUBLIC "-//W3C//DTD HTML 4.0 Transitional//EN" "http://www.w3.org/TR/REC-html40/loose.dtd">
-      <html xmlns="http://www.w3.org/1999/xhtml">
+      <html>
         <head>
-          <meta http-equiv="Content-Type" content="text/html; charset=UTF-8" />
-          <meta charset="UTF-8" />
+          <meta charset="UTF-8"></meta>
           <title>#{person.full_name}</title>
         </head>
         <body>
@@ -87,19 +86,19 @@ module DiasporaFederation
               <dl class="entity_photo">
                 <dt>Photo</dt>
                 <dd>
-                  <img class="photo avatar" width="300" height="300" src="#{photo_large_url}" />
+                  <img class="photo avatar" width="300" height="300" src="#{photo_large_url}"></img>
                 </dd>
               </dl>
               <dl class="entity_photo_medium">
                 <dt>Photo_medium</dt>
                 <dd>
-                  <img class="photo avatar" width="100" height="100" src="#{photo_medium_url}" />
+                  <img class="photo avatar" width="100" height="100" src="#{photo_medium_url}"></img>
                 </dd>
               </dl>
               <dl class="entity_photo_small">
                 <dt>Photo_small</dt>
                 <dd>
-                  <img class="photo avatar" width="50" height="50" src="#{photo_small_url}" />
+                  <img class="photo avatar" width="50" height="50" src="#{photo_small_url}"></img>
                 </dd>
               </dl>
             </div>
