diff --git a/app/controllers/graphs_controller.rb b/app/controllers/graphs_controller.rb
index 98c0b3b..6dd9e0a 100644
--- a/app/controllers/graphs_controller.rb
+++ b/app/controllers/graphs_controller.rb
@@ -211,10 +211,10 @@ class GraphsController < ApplicationController
         # Group issues
         issues_by_created_on = @version.fixed_issues.group_by {|issue| issue.created_on.to_date }.sort
         issues_by_updated_on = @version.fixed_issues.group_by {|issue| issue.updated_on.to_date }.sort
-        issues_by_closed_on = @version.fixed_issues.collect { |issue| issue if issue.closed? }.compact.group_by {|issue| issue.updated_on.to_date }.sort
+        issues_by_closed_on = @version.fixed_issues.collect {|issue| issue if issue.closed? }.compact.group_by {|issue| issue.updated_on.to_date }.sort
                     
         # Set the scope of the graph
-        scope_end_date = issues_by_updated_on.keys.last
+        scope_end_date = issues_by_updated_on.last.first
         scope_end_date = @version.effective_date if !@version.effective_date.nil? && @version.effective_date > scope_end_date
         scope_end_date = Date.today if !@version.completed?
         line_end_date = Date.today