diff --git a/app/views/rubriken/index.html.erb b/app/views/rubriken/index.html.erb
index 4093076..bcd5b8b 100755
--- a/app/views/rubriken/index.html.erb
+++ b/app/views/rubriken/index.html.erb
@@ -35,7 +35,11 @@
     </div>
 
     <div class="span3">
-      <%= render 'calendars/calentries', :object=>@calentries %>
+
+<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at.to_i}.updated_at.to_i.to_s) do %>
+<%= render 'calendars/calentries', :object=>@calentries %>
+<% end %>
+      
     </div>
   </div>
 </div>
diff --git a/app/views/rubriken/show.html.erb b/app/views/rubriken/show.html.erb
index c5ff9b6..44f8f79 100755
--- a/app/views/rubriken/show.html.erb
+++ b/app/views/rubriken/show.html.erb
@@ -47,9 +47,10 @@
 </div>
 <div class="span3">
 
-<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at}.updated_at.to_i.to_s) do %>
+<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at.to_i}.updated_at.to_i.to_s) do %>
 <%= render 'calendars/calentries', :object=>@calentries %>
 <% end %>
+
 <%= link_to "ics-format", calendar_path(@rubrik.calendar,:format=>:ics) %>
 </div>
 
diff --git a/app/views/themes/blue1/home/index.html.erb b/app/views/themes/blue1/home/index.html.erb
index ad7be14..14de407 100644
--- a/app/views/themes/blue1/home/index.html.erb
+++ b/app/views/themes/blue1/home/index.html.erb
@@ -56,7 +56,7 @@
   </ul>
 </div>
 <div class="span3">
-<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at}.updated_at.to_i.to_s) do %>
+<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at.to_i}.updated_at.to_i.to_s) do %>
 <%= render 'calendars/calentries', :object=>@calentries %>
 <% end %>