diff --git a/data/src/index.html b/data/src/index.html
index 787cb78..b8a3fc1 100644
--- a/data/src/index.html
+++ b/data/src/index.html
@@ -224,6 +224,13 @@
                 <input type="text" name="mempoolInstance" id="mempoolInstance" class="form-control">
               </div>
             </div>
+            <div class="row">
+              <label for="hostnamePrefix" class="col-sm-6 col-form-label col-form-label-sm">Hostname prefix</label>
+              <div class="col-sm-6">
+                <input type="text" name="hostnamePrefix" id="hostnamePrefix" class="form-control">
+                <div class="form-text">A restart is required to apply new hostname prefix.</div>
+              </div>
+            </div>
             <div class="row">
               <div class="col-sm-12">
                 <div class="form-check form-switch">