diff --git a/templates/index.html b/templates/index.html
index 64034c4..1cf0748 100644
--- a/templates/index.html
+++ b/templates/index.html
@@ -3,12 +3,18 @@
   <head>
     <meta charset="utf-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1" />
-    <link rel="stylesheet" href="{{ url_for('static', filename='styles.css') }}">
+    <link
+      rel="stylesheet"
+      href="{{ url_for('static', filename='styles.css') }}"
+    />
     <title>Temporary Indexing</title>
   </head>
   <body>
     <h1 class="title">Temporary Indexing</h1>
-    <p>{{ petname_message}}. You are anonymous. You may reveal your identity later when saving your generated files.</p>
+    <p>
+      {{ petname_message}}. You are anonymous. You may reveal your identity
+      later when saving your generated files.
+    </p>
 
     {% if generation_message %}
       <p> {{ generation_message }} </p>
@@ -38,7 +44,12 @@
           {{ upload_form.tags.label }}
           {{ upload_form.tags }}
 
-          <input type="hidden" id="petname" name="petname" value="{{ petname }}">
+          <input
+            type="hidden"
+            id="petname"
+            name="petname"
+            value="{{ petname }}"
+          />
 
           <input type="submit" value="generate" />
         </form>
@@ -51,7 +62,7 @@
         </ul>
         {% endif %}
       </div>
-      <div class ="iframe">
+      <div class="iframe">
         <object data="{{ pdf }}" type="application/pdf">
           <iframe src="{{ pdf }}"></iframe>
         </object>
