diff --git a/app/views/rubriken/index.html.erb b/app/views/rubriken/index.html.erb
index 1342689..3276566 100755
--- a/app/views/rubriken/index.html.erb
+++ b/app/views/rubriken/index.html.erb
@@ -36,7 +36,7 @@
 
     <div class="span3">
 
-<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at.to_i}.updated_at.to_i.to_s+params[:month]+params[:year]) do %>
+<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at.to_i}.updated_at.to_i.to_s+params[:month].to_s+params[:year].to_s) do %>
 <%= render 'calendars/calentries', :object=>@calentries %>
 <% end %>
       
diff --git a/app/views/rubriken/show.html.erb b/app/views/rubriken/show.html.erb
index c669492..4a8c7f5 100755
--- a/app/views/rubriken/show.html.erb
+++ b/app/views/rubriken/show.html.erb
@@ -47,7 +47,7 @@
 </div>
 <div class="span3">
 
-<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at.to_i}.updated_at.to_i.to_s+params[:month]+params[:year]) do %>
+<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at.to_i}.updated_at.to_i.to_s+params[:month].to_s+params[:year].to_s) do %>
 <%= render 'calendars/calentries', :object=>@calentries %>
 <% end %>
 
diff --git a/app/views/themes/blue1/home/index.html.erb b/app/views/themes/blue1/home/index.html.erb
index 53e4e49..669293b 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.to_i}.updated_at.to_i.to_s+params[:month]+params[:year]) do %>
+<% cache("calendar_" + @calentries.map{|c| c.id}.join('') + @calentries.max{|c|c.updated_at.to_i}.updated_at.to_i.to_s+params[:month].to_s+params[:year].to_s) do %>
 <%= render 'calendars/calentries', :object=>@calentries %>
 <% end %>