diff --git a/public/views/address.html b/public/views/address.html
index 4237598..f6bb95b 100644
--- a/public/views/address.html
+++ b/public/views/address.html
@@ -50,7 +50,7 @@
         </tr>
       </thead>
       <tbody>
-        <tr data-ng-repeat="transaction in address.transactions">
+        <tr data-ng-repeat="transaction in address.transactions track by $index">
           <td><a href="/#!/tx/{{transaction}}">{{transaction}}</a></td>
           <td>--</td>
           <td>--</td>
diff --git a/public/views/block.html b/public/views/block.html
index aced34b..68fb1dd 100644
--- a/public/views/block.html
+++ b/public/views/block.html
@@ -99,10 +99,12 @@
   <h2>Transactions <small>Transactions contained within this block</small></h2>
   <table class="table table-striped">
     <thead>
-      <th>Hash</th>
+      <tr>
+        <th>Hash</th>
+      </tr>
     </thead>
     <tbody>
-    <tr data-ng-repeat="tx in block.tx">
+    <tr data-ng-repeat="tx in block.tx track by $index">
       <td><a href="/#!/tx/{{tx}}">{{tx}}</a></td>
     </tr>
     </tbody>