diff --git a/lib/vmpooler/api/dashboard.rb b/lib/vmpooler/api/dashboard.rb
index 84bae1d..4c56798 100644
--- a/lib/vmpooler/api/dashboard.rb
+++ b/lib/vmpooler/api/dashboard.rb
@@ -83,7 +83,7 @@ module Vmpooler
             history ||= {}
 
             begin
-              buffer = open(graph_link('.ready.*&from=-1hour&format=json')).read
+              buffer = URI.parse(graph_link('.ready.*&from=-1hour&format=json')).read
               history = JSON.parse(buffer)
 
               history.each do |pool|
@@ -136,7 +136,7 @@ module Vmpooler
         if params[:history]
           if graph_url
             begin
-              buffer = open(graph_link('.running.*&from=-1hour&format=json')).read
+              buffer = URI.parse(graph_link('.running.*&from=-1hour&format=json')).read
               JSON.parse(buffer).each do |pool|
                 if pool['target'] =~ /.*\.(.*)$/
                   pool['name'] = Regexp.last_match[1]
diff --git a/lib/vmpooler/logger.rb b/lib/vmpooler/logger.rb
index f8a9644..218ec4c 100644
--- a/lib/vmpooler/logger.rb
+++ b/lib/vmpooler/logger.rb
@@ -16,7 +16,7 @@ module Vmpooler
 
       puts "[#{stamp}] #{string}" if ENV['VMPOOLER_DEBUG']
 
-      open(@file, 'a') do |f|
+      File.open(@file, 'a') do |f|
         f.puts "[#{stamp}] #{string}"
       end
     end