diff --git a/index.html b/index.html
index 65b461f..35ab69e 100644
--- a/index.html
+++ b/index.html
@@ -4,26 +4,26 @@
     <title>FediBlock prototype</title>
     <meta charset="utf-8" />
     <style>
-     label
-     {
-         display: block;
-         float: left;
-         width: 11ch;
-         text-align: right;
-         margin-right: 1ch;
-     }
-     input[type=text], input[type=url]
-     {
-         width: 60ch;
-     }
-     input[type=button]
-     {
-         padding: 0;
-     }
-     span.optional
-     {
-         font-style: italic;
-     }
+      label
+      {
+        display: block;
+        float: left;
+        width: 11ch;
+        text-align: right;
+        margin-right: 1ch;
+      }
+      input[type=text], input[type=url]
+      {
+        width: 60ch;
+      }
+      input[type=button]
+      {
+        padding: 0;
+      }
+      span.optional
+      {
+        font-style: italic;
+      }
     </style>
   </head>
   <body>
@@ -48,7 +48,7 @@
 
       <label for="receipts">Receipts:</label>
       <input type="url" id="receipts" name="receipts"
-             placeholder="https://example.com/@user/1234567890" required>
+        placeholder="https://example.com/@user/1234567890" required>
       <input type="button" id="add_receipt" value="➕" disabled><br>
 
       <label for="screenshot">Screenshot:</label>
