diff --git a/app/views/gantts/show.html.erb b/app/views/gantts/show.html.erb
index 3089028..66890b1 100644
--- a/app/views/gantts/show.html.erb
+++ b/app/views/gantts/show.html.erb
@@ -49,7 +49,7 @@ if @gantt.zoom > 1
 end
 
 # Width of the entire chart
-g_width = (@gantt.date_to - @gantt.date_from + 1) * zoom
+g_width = ((@gantt.date_to - @gantt.date_from + 1) * zoom).to_i
 
 @gantt.render(:top => headers_height + 8, :zoom => zoom, :g_width => g_width, :subject_width => subject_width)
 
@@ -89,7 +89,7 @@ month_f = @gantt.date_from
 left = 0
 height = (show_weeks ? header_heigth : header_heigth + g_height)
 @gantt.months.times do
-  width = ((month_f >> 1) - month_f) * zoom - 1
+  width = (((month_f >> 1) - month_f) * zoom - 1).to_i
   %>
   <div style="left:<%= left %>px;width:<%= width %>px;height:<%= height %>px;" class="gantt_hdr">
   <%= link_to h("#{month_f.year}-#{month_f.month}"), @gantt.params.merge(:year => month_f.year, :month => month_f.month), :title => "#{month_name(month_f.month)} #{month_f.year}"%>
@@ -107,10 +107,10 @@ if show_weeks
   left = 0
   height = (show_days ? header_heigth - 1 : header_heigth - 1 + g_height)
   if @gantt.date_from.cwday == 1
-      # @date_from is monday
-        week_f = @gantt.date_from
+    # @date_from is monday
+    week_f = @gantt.date_from
   else
-      # find next monday after @date_from
+    # find next monday after @date_from
     week_f = @gantt.date_from + (7 - @gantt.date_from.cwday + 1)
     width = (7 - @gantt.date_from.cwday + 1) * zoom - 1
     %>
@@ -120,7 +120,7 @@ if show_weeks
   end %>
   <%
   while week_f <= @gantt.date_to
-    width = (week_f + 6 <= @gantt.date_to) ? 7 * zoom - 1 : (@gantt.date_to - week_f + 1) * zoom - 1
+    width = ((week_f + 6 <= @gantt.date_to) ? 7 * zoom - 1 : (@gantt.date_to - week_f + 1) * zoom - 1).to_i
     %>
     <div style="left:<%= left %>px;top:19px;width:<%= width %>px;height:<%= height %>px;" class="gantt_hdr">
     <small><%= week_f.cweek if width >= 16 %></small>
@@ -159,7 +159,7 @@ end %>
 # Today red line (excluded from cache)
 #
 if Date.today >= @gantt.date_from and Date.today <= @gantt.date_to %>
-    <div style="position: absolute;height:<%= g_height %>px;top:<%= headers_height + 1 %>px;left:<%= ((Date.today - @gantt.date_from + 1) * zoom).floor() - 1 %>px;width:10px;border-left: 1px dashed red;">&nbsp;</div>
+    <div style="position: absolute;height:<%= g_height %>px;top:<%= headers_height + 1 %>px;left:<%= (((Date.today - @gantt.date_from + 1) * zoom).floor() - 1).to_i %>px;width:10px;border-left: 1px dashed red;">&nbsp;</div>
 <% end %>
 
 </div>