diff --git a/src/footer.tmpl.html b/src/footer.tmpl.html
index d2b1496..5f0f51e 100644
--- a/src/footer.tmpl.html
+++ b/src/footer.tmpl.html
@@ -1,6 +1,6 @@
 <md-toast role="alert" aria-relevant="all">
   <span class="md-toast-text" flex>{{ctrl.toastMessage}}</span>
-  <md-button ng-click="ctrl.goToUrl(ctrl.url)">
+  <md-button ng-click="ctrl.goToUrl(ctrl.url)" ng-if="ctrl.url">
       {{ctrl.buttonText}}
   </md-button>
 </md-toast>
diff --git a/src/styles/style.css b/src/styles/style.css
index c6e6d74..a14e9de 100644
--- a/src/styles/style.css
+++ b/src/styles/style.css
@@ -1,4 +1,5 @@
 html, body {
+	min-height: 500px;
   width: 600px;
 }