diff --git a/plugins/mezuro/lib/mezuro_plugin/helpers/content_viewer_helper.rb b/plugins/mezuro/lib/mezuro_plugin/helpers/content_viewer_helper.rb
index 5cdad46..2419960 100644
--- a/plugins/mezuro/lib/mezuro_plugin/helpers/content_viewer_helper.rb
+++ b/plugins/mezuro/lib/mezuro_plugin/helpers/content_viewer_helper.rb
@@ -16,7 +16,10 @@ class MezuroPlugin::Helpers::ContentViewerHelper
                 :bg => {:color => 'efefef', :type => 'stripes'},
                 :line_colors => 'c4a000',
                 :data => values,
-                :axis_with_labels => 'y')
+                :axis_with_labels => 'y',
+                :max_value => values.max,
+                :min_value => values.min
+                )
   end
 
   def self.get_periodicity_option(index)
--
libgit2 0.21.2